Source: China Meteorological News Release time: 2007-06-21
1. Typhoon warning signal
Typhoon warning signals are divided into four levels, which are represented by blue, yellow, orange and red respectively.
(1) Typhoon blue warning signal
Standard: within 24 hours, it may or has been affected by a tropical cyclone, the average coastal or land wind is above level 6, or the gust is above level 8 and may continue.
Defense guidelines: 1. The government and relevant departments shall make preparations for typhoon prevention in accordance with their responsibilities; 2. Stop outdoor collective activities and high-altitude and other outdoor dangerous operations; 3. Water operations in relevant waters and passing ships take active countermeasures, such as returning to Hong Kong to avoid wind Or detour navigation, etc.; 4. Reinforce doors and windows, hoardings, scaffolding, billboards and other structures that are easily blown by the wind, and cut off dangerous outdoor power supplies.
(2) Typhoon yellow warning signal
Standard: within 24 hours, it may be or has been affected by a tropical cyclone, the average coastal or land wind is above level 8, or the gust is above level 10 and may continue.
Defense guidelines: 1. The government and relevant departments shall make emergency preparations for typhoon prevention in accordance with their responsibilities; 2. Stop large-scale indoor and outdoor gatherings and high-altitude outdoor dangerous operations; 3. Water operations in relevant waters and passing ships take active countermeasures to strengthen ports 4. Reinforce or remove structures that are easily blown by the wind. Personnel should not go out at will. Ensure that the elderly and children stay in the safest place at home, and people in dangerous houses are transferred in time.
(3) Orange typhoon early warning signal
Standard: within 12 hours, it may or has been affected by a tropical cyclone, and the average coastal or land wind is above level 10, or the gust is above level 12 and may continue.
Defense guidelines: 1. The government and relevant departments should do a good job in emergency response to typhoon in accordance with their responsibilities; 2. Stop large-scale indoor and outdoor gatherings, suspend classes, and suspend business (except for special industries); 3. Water operations in relevant waters and passing ships should return to Hong Kong for shelter. , to strengthen port facilities, to prevent ships from anchoring, grounding and collision; 4. To strengthen or remove structures that are easily blown by the wind, personnel should stay in a windproof and safe place as much as possible. When the center of the typhoon passes by, the wind force will decrease or stand still For a period of time, remember that the strong wind will blow suddenly, you should continue to stay in a safe place to shelter from the wind, and move people in dangerous houses in time; 5. Relevant areas should pay attention to prevent mountain torrents and geological disasters that may be caused by heavy rainfall.
(4) Typhoon red warning signal
Standards: Tropical cyclones may or have been affected within 6 hours, and the average coastal or land wind force is above level 12, or the gust is above level 14 and may continue.
Defense guidelines: 1. The government and relevant departments should do a good job of typhoon emergency response and rescue work according to their responsibilities; 2. Stop gatherings, classes, and businesses (except for special industries); 3. Ships returning to Hong Kong for shelter should take active measures according to the situation, Arrange personnel to stay behind or move to a safe area; 4. Reinforce or remove structures that are easily blown by the wind. Personnel should stay in a safe place against wind. When the typhoon center passes by, the wind will decrease or stand still for a period of time. In case of a sudden blow, you should stay in a safe place to avoid the wind, and people in dilapidated houses should be transferred in time; 5. Relevant areas should pay attention to prevent mountain torrents and geological disasters that may be caused by heavy rainfall.
2. Rainstorm warning signal
The rainstorm warning signal is divided into four levels, which are represented by blue, yellow, orange and red respectively.
(1) Blue rainstorm warning signal
Standard: The rainfall will reach more than 50 mm within 12 hours, or it has reached more than 50 mm and the rainfall may continue.
Defense guidelines: 1. The government and relevant departments should prepare for heavy rain according to their responsibilities; 2. Schools and kindergartens should take appropriate measures to ensure the safety of students and young children; 3. Drivers should pay attention to road water and traffic congestion to ensure safety; 4 .Check the drainage system of cities, farmland, and fish ponds, and make preparations for drainage.
(2) Yellow rainstorm warning signal
Standard: The rainfall will reach more than 50 mm within 6 hours, or it has reached more than 50 mm and the rainfall may continue.
Defense guidelines: 1. The government and relevant departments should do a good job in anti-storm work according to their duties; 2. The traffic management department should take traffic control measures on heavy rainfall sections according to road conditions, and implement traffic guidance on flooded sections; 3. Cut off dangerous areas in low-lying areas. Outdoor power supply, suspend outdoor work in open areas, transfer people in dangerous areas and residents of dilapidated houses to safe places to avoid rain; 4. Check the drainage systems of cities, farmland, and fish ponds, and take necessary drainage measures.
(3) Orange warning signal for rainstorm
Standard: The rainfall will reach more than 50 mm within 3 hours, or it has reached more than 50 mm and the rainfall may continue.
Defense guidelines: 1. The government and relevant departments should do a good job in emergency response to rainstorms according to their duties; 2. Cut off dangerous outdoor power supplies and suspend outdoor operations; 3. Units in dangerous areas should suspend classes and businesses, and take special measures to protect those who have arrived at the school. 4. Do a good job of drainage in cities and farmland, and pay attention to prevent possible disasters such as mountain torrents, landslides, and mudslides.
(4) Red rainstorm warning signal
Standard: The rainfall will reach more than 100 mm within 3 hours, or it has reached more than 100 mm and the rainfall may continue.
Defense guidelines: 1. The government and relevant departments should do a good job in emergency response and emergency rescue work in accordance with their duties; 2. Stop gatherings, classes, and businesses (except for special industries); 3. Do a good job in the defense and rescue of mountain torrents, landslides, mudslides and other disasters Work.
3. Blizzard warning signal
Blizzard warning signals are divided into four levels, which are represented by blue, yellow, orange and red respectively.
(1) Blizzard blue warning signal
Standard: The snowfall will reach more than 4 mm within 12 hours, or it has reached more than 4 mm and the snowfall continues, which may have an impact on traffic or agriculture and animal husbandry.
Defense guidelines: 1. The government and relevant departments should prepare for snow disasters and frost damage according to their responsibilities; 2. Departments of transportation, railways, electric power, and communications should conduct inspections and maintenance of roads, railways, and lines, and do a good job in road cleaning and snow melting 3. Pedestrians should pay attention to cold and anti-skid, drivers should drive carefully, and vehicles should take anti-skid measures; 4. Farming and pastoral areas and breeding industries should store feed and prepare for snow disasters and frost damage; 5. Reinforce scaffolding, etc. Snow-pressed temporary structures.
(2) Blizzard yellow warning signal
Standard: The snowfall will reach more than 6 mm within 12 hours, or it has reached more than 6 mm and the snowfall continues, which may have an impact on traffic or agriculture and animal husbandry.
Defense guidelines: 1. The government and relevant departments implement measures to prevent snow disasters and frost damage according to their responsibilities; 2. Departments of transportation, railways, electric power, and communications should strengthen road, railway, and line inspection and maintenance, and do a good job in road cleaning and snow melting; 3. Pedestrians should pay attention to cold and anti-skid, drivers should drive carefully, and anti-skid measures should be taken for vehicles; 4. Farming and pastoral areas and farming and breeding industries should prepare enough feed, and prepare for snow disasters and frost damage; 5. Reinforce scaffolding, etc. Pressed temporary structures.
(3) Blizzard orange warning signal
Standard: The snowfall will reach more than 10 mm within 6 hours, or it has reached more than 10 mm and the snowfall continues, which may or has already had a major impact on traffic or agriculture and animal husbandry.
Defense guidelines: 1. The government and relevant departments should do a good job in emergency response to snow disasters and frost damage according to their responsibilities; 2. Departments of transportation, railways, electric power, and communications should strengthen road, railway, and line inspection and maintenance, and do a good job in road cleaning and snow accumulation. 3. Reduce unnecessary outdoor activities; 4. Reinforce scaffolding and other temporary structures that are easily crushed by snow, and drive outdoor livestock into sheds for feeding.
(4) Blizzard red warning signal
Standard: The snowfall will reach more than 15 mm within 6 hours, or it has reached more than 15 mm and the snowfall continues, which may or has already had a major impact on traffic or agriculture and animal husbandry.
Defense guidelines: 1. The government and relevant departments should do a good job of emergency and rescue work for preventing snow disasters and freezing damage according to their responsibilities; 2. Suspend classes and businesses (except for special industries) when necessary; 3. Suspend take-off and landing of aircraft and suspend train operations when necessary , the expressway is temporarily closed; 4. Do a good job in disaster relief and relief work in pastoral areas.
4. Cold wave early warning signal
The cold wave early warning signal is divided into four levels, which are represented by blue, yellow, orange and red respectively.
(1) Cold wave blue warning signal
Standard: the minimum temperature will drop by more than 8°C within 48 hours, the minimum temperature is less than or equal to 4°C, and the average wind force on land can reach level 5 or above; or has dropped by more than 8°C, the minimum temperature is less than or equal to 4°C, and the average wind force is above level 5, and may continue.
Defense guidelines: 1. The government and relevant departments make preparations for cold waves according to their responsibilities; 2. Pay attention to adding clothes to keep warm; 3. Take certain protective measures for tropical crops and aquatic products; 4. Make preparations for wind protection.
(2) Yellow warning signal for cold wave
Standard: the minimum temperature will drop by more than 10°C within 24 hours, the minimum temperature is less than or equal to 4°C, and the average wind force on land can reach level 6 or above; or has dropped by more than 10°C, the minimum temperature is less than or equal to 4°C, and the average wind force is above level 6, and may continue.
Defense guidelines: 1. The government and relevant departments do a good job of preventing cold waves according to their duties; 2. Pay attention to adding clothes to keep warm, and take good care of the old, weak, and sick; 3. Take care of livestock, poultry, tropical and subtropical fruits and related aquatic products, crops, etc. Take cold protection measures; 4. Do a good job of wind protection.
(3) Orange warning signal for cold wave
Standard: The minimum temperature will drop by more than 12°C within 24 hours, the minimum temperature is less than or equal to 0°C, and the average wind force on land can reach level 6 or above; or has dropped by more than 12°C, the minimum temperature is less than or equal to 0°C, and the average wind force is above level 6, and may continue.
Defense guidelines: 1. The government and relevant departments should do a good job of cold wave emergency response according to their duties; 2. Pay attention to cold protection and warmth; 3. Agriculture, aquaculture, animal husbandry, etc. should actively take anti-frost, freezing and other cold protection measures to minimize losses; 4 . Do a good job of wind protection.
(4) Cold wave red warning signal
Standard: the minimum temperature will drop by more than 16°C within 24 hours, the minimum temperature is less than or equal to 0°C, and the average wind force on land can reach level 6 or above; or has dropped by more than 16°C, the minimum temperature is less than or equal to 0°C, and the average wind force is above level 6, and may continue.
Defense guidelines: 1. The government and relevant departments should do a good job of emergency and rescue work against cold waves according to their responsibilities; 2. Pay attention to cold protection and warmth; 3. Agriculture, aquaculture, animal husbandry, etc. 4. Do a good job of wind protection.
5. Gale warning signal
There are four levels of early warning signals for strong winds (except typhoons), which are represented by blue, yellow, orange and red respectively.
(1) Blue early warning signal for strong wind
Standard: within 24 hours, it may be affected by strong winds, with an average wind force of 6 or above, or a gust of 7 or above; or already affected by strong winds, with an average wind force of 6 to 7, or a gust of 7 to 8 and may continue.
Defense guidelines: 1. The government and relevant departments do a good job of preventing strong winds according to their duties; 2. Close doors and windows, reinforce hoardings, scaffolding, billboards and other structures that are easily blown by the wind, and properly arrange outdoor areas that are easily affected by strong winds. 3. Active countermeasures should be taken for water operations in relevant waters and passing ships, such as returning to the port to avoid the wind or sailing around; 5. Relevant departments and units pay attention to fire prevention in forests and grasslands.
(2) Yellow early warning signal for strong wind
Standard: within 12 hours, it may be affected by strong winds, with an average wind force of 8 or above, or gusts of 9 or above; or already affected by strong winds, with an average wind force of 8 to 9, or gusts of 9 to 10 and may continue.
Defense guidelines: 1. The government and relevant departments do a good job of preventing strong winds according to their duties; 2. Stop open-air activities and high-altitude and other outdoor dangerous operations, and people in dangerous areas and residents of dilapidated houses try to go to sheltered places to avoid wind; 3. Water operations in relevant waters and past Ships take active countermeasures to strengthen port facilities to prevent ships from anchoring, grounding and collision; 4. Cut off outdoor dangerous power sources, properly arrange outdoor items that are vulnerable to strong winds, and cover building materials; 5. Airports, highways and other units should Take measures to ensure traffic safety, and relevant departments and units pay attention to fire prevention in forests and grasslands.
(3) Orange warning signal for strong winds
Standard: within 6 hours, it may be affected by strong winds, with an average wind force of 10 or above, or a gust of 11 or above; or already affected by strong winds, with an average wind force of 10 11, or a gust of 11 12 and may continue.
Defense guidelines: 1. The government and relevant departments should do a good job of emergency response to strong winds according to their responsibilities; 2. Primary and secondary schools and units with weak wind resistance should suspend classes and businesses, and reduce the number of people going out; 3. Water operations in relevant waters and passing ships should Return to the port to avoid the wind, strengthen port facilities, and prevent ships from anchoring, stranded and colliding; 4. Cut off dangerous power sources, properly arrange outdoor items that are vulnerable to strong winds, and cover building materials; 5. Airports, railways, highways, water transportation and other units Measures should be taken to ensure traffic safety, and relevant departments and units should pay attention to fire prevention in forests and grasslands.
(4) Red early warning signal for strong wind
Standard: within 6 hours, it may be affected by strong winds, with an average wind force of 12 or above, or a gust of 13 or above; or already affected by strong winds, with an average wind force of 12 or above, or a gust of 13 or above and may continue.
Defense guidelines: 1. The government and relevant departments should do a good job of emergency response and rescue work in accordance with their duties; 2. Personnel should stay in a safe place against wind as much as possible, and do not go out at will; 3. Ships returning to port for shelter should take active measures according to the situation 4. Cut off dangerous power sources, properly arrange outdoor items that are easily affected by strong winds, and cover building materials; 5. Airports, railways, expressways, water transportation and other units should take measures to ensure traffic safety Relevant departments and units pay attention to fire prevention in forests and grasslands.
6. Sandstorm warning signal
Sandstorm warning signals are divided into three levels, which are represented by yellow, orange and red respectively.
(1) Yellow warning signal of sandstorm
Standard: A sandstorm may occur within 12 hours (visibility is less than 1000 meters), or a sandstorm has already occurred and may continue.
Defense guidelines: 1. The government and relevant departments do a good job of preventing sandstorms according to their duties; 2. Close doors and windows, reinforce hoardings, scaffolding, billboards and other structures that are easily blown by the wind, and properly arrange outdoor areas that are easily affected by strong winds. 3. Pay attention to carry dust-proof products such as masks and scarves to avoid damage to the eyes and respiratory tract caused by sand and dust; 4. Patients with respiratory diseases and those who are more sensitive to wind and sand should not come outdoor activities.
(2) Orange warning signal of sandstorm
Standard: A strong sandstorm may occur within 6 hours (visibility is less than 500 meters), or a strong sandstorm has already occurred and may continue.
Defense guidelines: 1. The government and relevant departments should do a good job in emergency response to sandstorms according to their duties; 2. Stop open-air activities and outdoor dangerous operations such as high altitudes and water; 3. Airports, railways, expressways and other units should take protective measures for traffic safety, Drivers pay attention to changes in sandstorms and drive carefully; 4. Pedestrians should ride bicycles as little as possible, and outdoor personnel should wear dust-proof products such as masks and gauze scarves, and pay attention to traffic safety.
(3) Red warning signal of sandstorm
Standard: Extremely strong sandstorms (visibility less than 50 meters) may occur within 6 hours, or extremely strong sandstorms have already occurred and may continue.
Defense guidelines: 1. The government and relevant departments should do a good job of emergency rescue work for sandstorm prevention according to their duties; 2. Personnel should stay in windproof and dustproof places, and do not go outdoors; 3. Schools and kindergartens postpone school or leave school until extremely strong The sandstorm is over; 4. Aircraft takeoff and landing are suspended, trains are suspended, and expressways are temporarily closed.
Seven, high temperature warning signal
The high temperature early warning signal is divided into three levels, which are represented by yellow, orange and red respectively.
(1) High temperature yellow warning signal
Standard: The daily maximum temperature will be above 35°C for three consecutive days.
Defense guidelines: 1. Relevant departments and units make preparations for heatstroke prevention and cooling according to their responsibilities; 2. Minimize outdoor activities in the afternoon; 3. Provide heatstroke prevention and cooling guidance for the elderly, weak, sick, and young people; 4. Work under high temperature conditions and during the day Personnel who need to work outdoors for a long time should take necessary protective measures.
(2) High temperature orange warning signal
Standard: The highest temperature will rise above 37°C within 24 hours.
Defense guidelines: 1. Relevant departments and units implement heatstroke prevention and cooling measures according to their responsibilities; 2. Try to avoid outdoor activities during high temperature periods, and those who work under high temperature conditions should shorten their continuous working hours; 3. For the elderly, weak, sick, and young The crowd should provide guidance on heatstroke prevention and cooling, and take necessary protective measures; 4. Relevant departments and units should pay attention to preventing fires caused by excessive power consumption and excessive electrical loads such as wires and transformers.
(3) High temperature red warning signal
Standard: The highest temperature will rise above 40°C within 24 hours.
Defense guidelines: 1. Relevant departments and units take emergency measures for heatstroke prevention and cooling according to their responsibilities; 2. Stop outdoor operations (except for special industries); 3. Take protective measures for the elderly, weak, sick, and young people; 4. Relevant departments and Units should pay special attention to fire prevention.
8. Drought warning signal
Drought early warning signals are divided into two levels, indicated in orange and red respectively. The classification of drought indicators is based on the comprehensive meteorological drought index in the national standard "Meteorological Drought Grade" (GB/T20481-2006).
(1) Orange warning signal for drought
Standard: It is expected that the comprehensive meteorological drought index will reach severe drought in the coming week (meteorological drought occurs once every 25 to 50 years), or more than 40% of the crops in a certain county (district) will suffer from drought.
Defense guidelines: 1. Relevant departments and units do a good job of emergency response to drought in accordance with their responsibilities; 2. Relevant departments use emergency backup water sources, dispatch all available water sources within their jurisdiction, and give priority to ensuring domestic water for urban and rural residents and drinking water for livestock; 3. Reduce urban and rural areas Water supply indicators, giving priority to irrigation water for economic crops, and restricting large amounts of agricultural irrigation water; 4. Restricting high non-productive water consumption and service industry water, and restricting the discharge of industrial sewage; 5. Meteorological departments carry out artificial rainfall enhancement operations in due course.
(2) Drought red warning signal
Standard: It is expected that the comprehensive meteorological drought index will reach extreme drought in the coming week (meteorological drought occurs once in more than 50 years), or more than 60% of the crops in a certain county (district) will suffer from drought.
Defense guidelines: 1. Relevant departments and units do a good job in emergency response to drought prevention and disaster relief in accordance with their responsibilities; 2. Governments at all levels and relevant departments initiate emergency water supply plans such as long-distance water transfer, and adopt external water, deep well drilling, and vehicle water delivery, etc. Various methods are used to ensure drinking water for urban and rural residents and livestock; 3. Time-limited or limited supply of domestic water for urban residents, reduction or phased suspension of agricultural irrigation water supply; 4. Strictly prohibit non-productive high water consumption and service industry water, and suspend the discharge of industrial sewage ; 5. The meteorological department will increase the intensity of artificial rainfall enhancement operations in due course.
9. Lightning warning signal
There are three levels of lightning warning signals, which are represented by yellow, orange and red respectively.
(1) Yellow lightning warning signal
Standard: Thunder and lightning activities may occur within 6 hours, which may cause lightning disasters.
Defense guidelines: 1. The government and relevant departments do a good job in lightning protection according to their duties; 2. Pay close attention to the weather and try to avoid outdoor activities.
(2) Orange lightning warning signal
Standard: There is a high possibility of lightning activity within 2 hours, or it has been affected by lightning activity and may continue, and the possibility of lightning disaster accidents is relatively high.
Defense guidelines: 1. The government and relevant departments implement lightning protection emergency measures according to their duties; 2. Personnel should stay indoors and close doors and windows; 3. Outdoor personnel should hide in buildings or cars with lightning protection facilities; 4. Cut off the dangerous power supply, and do not take shelter from the rain under trees, electric poles, or tower cranes; 5. Do not open an umbrella in an open field, and do not carry agricultural tools, badminton rackets, golf clubs, etc. on your shoulders.
(3) Lightning red warning signal
Standard: The possibility of lightning activity within 2 hours is very high, or strong lightning activity has already occurred and may continue, and the possibility of lightning disaster accidents is very high.
Defense guidelines: 1. The government and relevant departments should do a good job in lightning protection and emergency rescue according to their responsibilities; 2. Personnel should try to hide in buildings or cars with lightning protection facilities, and close doors and windows; 3. Do not touch antennas and water pipes , barbed wire, metal doors and windows, building exterior walls, stay away from live equipment such as wires and other similar metal devices; 4. Try not to use TVs, telephones and other electrical appliances without lightning protection devices or incomplete lightning protection devices; 5. Pay close attention to lightning warnings Release of Information.
10. Hail warning signal
Hail warning signals are divided into two levels, indicated in orange and red respectively.
(1) Orange warning signal for hail
Standard: Hail weather may occur within 6 hours and may cause hail disasters.
Defense guidelines: 1. The government and relevant departments should do a good job of hail prevention emergency work according to their duties; 2. The meteorological department should prepare for artificial hail prevention operations and carry out operations at an appropriate time; 3. Outdoor pedestrians should immediately take shelter in a safe place; 4. Drive away Poultry and livestock enter a place with a canopy, and properly protect outdoor items or equipment such as cars that are vulnerable to hail; 5. Pay attention to defend against lightning disasters accompanied by hail weather.
(2) Red warning signal for hail
Standard: Hail is extremely likely to occur within 2 hours and may cause severe hail disasters.
Defense guidelines: 1. The government and relevant departments should do a good job of emergency and rescue work for hail prevention according to their duties; 2. The meteorological department will carry out artificial hail suppression operations in due course; 3. Outdoor pedestrians should immediately take shelter in a safe place; 4. Drive away poultry and livestock Enter a place with a canopy and properly protect outdoor items or equipment such as cars that are vulnerable to hail; 5. Pay attention to the lightning disasters associated with hail weather.
11. Frost warning signal
There are three levels of frost warning signals, which are represented by blue, yellow and orange respectively.
(1) Blue warning signal of frost
Standard: The minimum ground temperature will drop below 0°C within 48 hours, which will have an impact on agriculture, or has dropped below 0°C, which has already had an impact on agriculture and may continue.
Defense guidelines: 1. The government and the competent departments of agriculture and forestry shall prepare for frost protection according to their responsibilities; 2. Certain protective measures shall be taken for crops, vegetables, flowers, melons and fruits, and forestry breeding
3. Rural grassroots organizations and farmers should pay attention to local frost warning information in order to take measures to strengthen protection.
(2) Yellow warning signal of frost
Standard: The minimum ground temperature will drop below minus 3°C within 24 hours, which will have a serious impact on agriculture, or has dropped below minus 3°C, which will have a serious impact on agriculture and may continue.
Defense guidelines: 1. The government and the competent departments of agriculture and forestry should do a good job of frost prevention and emergency response according to their responsibilities; 2. Rural grassroots organizations should extensively mobilize the masses to prevent and fight disasters; 3. For crops and forestry breeding, they should actively adopt field irrigation to prevent frost and freezing 4. For vegetables, flowers, melons and fruits, measures such as covering and spraying antifreeze should be taken to reduce freezing damage.
(3) Orange warning signal of frost
Standard: The minimum ground temperature will drop below minus 5°C within 24 hours, which will have a serious impact on agriculture, or has dropped below minus 5°C, which will have a serious impact on agriculture and will continue.
Defense guidelines: 1. The government and the competent departments of agriculture and forestry should do a good job in emergency frost prevention according to their responsibilities; 2. Rural grassroots organizations should extensively mobilize the masses to prevent and fight disasters; countermeasures to minimize losses.
12. Early warning signal of heavy fog
There are three levels of early warning signals for heavy fog, which are represented by yellow, orange and red respectively.
(1) Yellow early warning signal of heavy fog
Standard: Fog with a visibility of less than 500 meters may appear within 12 hours, or fog with a visibility of less than 500 meters but greater than or equal to 200 meters has already occurred and will continue.
Defense guidelines: 1. Relevant departments and units should make anti-fog preparations according to their responsibilities; 2. Airports, expressways, ferry terminals and other units should strengthen traffic management to ensure safety; 3. Drivers should pay attention to changes in fog and drive carefully; 4. Pay attention to safety in outdoor activities.
(2) Orange warning signal for heavy fog
Standard: fog with visibility less than 200 meters may appear within 6 hours, or fog with visibility less than 200 meters but greater than or equal to 50 meters has already appeared and will continue.
Defense guidelines: 1. Relevant departments and units do a good job of anti-fog work according to their duties; 2. Airports, expressways, ferry terminals and other units strengthen dispatching and command; 3. Drivers must strictly control the speed of vehicles and ships; 4. Reduce outdoor traffic. Activity.
(3) Red fog warning signal
Standard: Fog with visibility less than 50 meters may appear within 2 hours, or fog with visibility less than 50 meters has occurred and will continue.
Defense guidelines: 1. Relevant departments and units do a good job of anti-fog emergency work according to their duties; 2. Relevant units take timely traffic safety control measures in accordance with industry regulations, such as suspending aircraft take-off and landing at airports, temporarily closing expressways, temporarily suspending ferries, etc.; 3 .Drivers should take preventive measures in foggy weather according to driving regulations in foggy weather, adopt reasonable driving methods according to environmental conditions, and find a safe parking area to stop as soon as possible; 4. Do not carry out outdoor activities.
13. Haze early warning signal
Haze warning signals are divided into two levels, which are represented by yellow and orange respectively.
(1) Haze yellow warning signal
Standard: Haze with visibility less than 3,000 meters may occur within 12 hours, or haze with visibility less than 3,000 meters has already occurred and may continue.
Defense guidelines: 1. Drivers drive carefully; 2. As the air quality is significantly lower, personnel need to take appropriate protection; 3. Patients with respiratory diseases should try to avoid going out and wear masks when going out.
(2) Haze orange warning signal
Standard: Haze with visibility less than 2,000 meters may appear within 6 hours, or haze with visibility less than 2,000 meters has already occurred and may continue.
Defense guidelines: 1. Airports, highways, ferry terminals and other units strengthen traffic management to ensure safety; 2. Drivers drive carefully; 3. The air quality is poor, and personnel need to be properly protected; 4. Personnel should reduce outdoor activities, and patients with respiratory diseases should try their best Avoid going out and wear a mask when you go out.
14. Road icing warning signal
Road icing warning signals are divided into three levels, which are represented by yellow, orange and red respectively.
(1) Yellow warning signal for icy roads
Standard: When the road surface temperature is lower than 0°C and precipitation occurs, road icing that may affect traffic may occur within 12 hours.
Defense guidelines: 1. Traffic, public security and other departments should prepare for road icing according to their responsibilities; 2. Drivers should pay attention to road conditions and drive safely; 3. Pedestrians should ride bicycles as little as possible when going out, and pay attention to anti-skid.
(2) Orange warning signal for icy roads
Standard: When the road surface temperature is lower than 0°C and precipitation occurs, road icing may occur within 6 hours, which will have a great impact on traffic.
Defense guidelines: 1. Traffic, public security and other departments should do a good job in emergency response to icy roads according to their duties; 2. Drivers must take anti-skid measures, follow instructions, and drive slowly; 3. Pedestrians should pay attention to anti-skid when going out.
(3) Red warning signal for icy roads
Standard: When the road surface temperature is lower than 0°C, precipitation occurs, and road icing may occur or has already occurred within 2 hours, which will have a great impact on traffic.
Defense guidelines: 1. Traffic, public security and other departments do a good job in emergency response and rescue work for icy roads; 2. Traffic, public security and other departments pay attention to directing and diverting vehicles, and close icy road traffic when necessary; 3. Minimize people going out.