Is the weather cooler?

Guangzhou quickly warmed up

Guangzhou Daily News (All-media reporter Yekas, correspondent Qingyu) Remember the summer a few years ago, when it was colder than the winter solstice? This year, Lixia seems to have such a feeling again. Rain and cold air went hand in hand, causing Guangzhou to cool down significantly. It often rains heavily on 5 May, and this year it was another case. Yesterday there was a strong thunderstorm in Guangzhou, and a level 7 gust appeared in Baiyun District. After this rain, Guangzhou got a rare coolness in recent times. Today, the temperature is high again, and the slightly thicker quilt can almost be put away.

During the day yesterday, except for showers in the north-central part of northern Guangdong and the Leizhou Peninsula, most of the other cities and counties in Guangdong experienced heavy to heavy rain and local heavy rain.

According to meteorological and hydrological monitoring, from 8 o'clock to 17 o'clock yesterday, the average rainfall in Guangdong Province was 31.5 mm, and the town streets exceeding 25 mm accounted for 65.6% of the total number of town streets in the province, 27 town streets recorded heavy rain of more than 100 mm, 328 town streets recorded heavy rain of 50 mm ~ 100 mm, 608 town streets recorded heavy rain of 25 mm ~ 50 mm, and the town streets with the largest rainfall in each city are: Luzhou Town, Huicheng District, Huizhou 154.7 mm, Taimei Town, Boluo County 141.6 mm, Gaogang Town, Fogang County, Qingyuan 139.4 mm, Yaotian Town, Xinfeng County, Shaoguan 119 mm, Tanxi Town, Lufeng City, Shanwei 117.2 mm, and Huanglongdai Reservoir Management Office, Conghua District, Guangzhou 117 mm.

Affected by cold air and precipitation, the maximum temperature in most of Guangdong dropped by 1 °C ~ 5 °C yesterday. Zhanjiang Xuwen recorded the highest temperature in the province of 33.5°C. Qingyuan Lianzhou recorded the lowest temperature in the province of 17.8°C.

Guangzhou city yesterday day, cloudy, moderate to heavy rain local heavy rain, the highest temperature of 29 °C, down 0.8 °C from the day before yesterday, relative humidity 95% ~ 100%. Affected by cold air and precipitation, the lowest temperature yesterday appeared around noon, at 22.5°C, down 2.9°C from the day before yesterday.

The Meteorological Observatory predicts that most of Guangdong will be cloudy in the next three days. From May 5 to 8, Guangzhou will be mainly cloudy and cloudy, with more clouds, occasional showers, and the temperature is between 10 °C ~ 20 °C.

There are high tricks to save

One case per case (2)

What should I do if my companion is struck by lightning?

Guangzhou Daily News (All-media reporter Huang Qing) Yesterday, heavy rainfall hit Guangzhou, and the meteorological department issued a yellow warning signal for heavy rain in many areas. The Municipal General Headquarters for Three Defense decided to launch a three-level emergency response to prevent storm rain and waterlogging, and notified all units and departments to do a good job in defense work in accordance with the provisions of the plan, focusing on the defense of urban and rural waterlogging, flash floods, small watershed floods, landslides and other disasters. Relevant departments strengthen monitoring in high-risk areas, pay attention to prevention, urban waterlogging and other disasters; Pay attention to the prevention of lightning and short-term winds and the collapse disasters caused by factory sheds, construction site tower cranes, temporary structures, outdoor billboards, trees, etc.

Two months ago, there was strong convective weather in many parts of the country, and several disasters occurred. Among them, on March 3, two accidents were unfortunately killed by lightning strikes in Wenzhou, Zhejiang Province. At about 22 p.m. that day, the command and dispatch hall of the Wenzhou Emergency Center received a call saying that a staff member was suddenly struck by lightning while working at sea and was unconscious. After the patient's boat landed, the emergency doctor found that the patient had cyanosis, heartbeat and breathing had stopped, and immediately gave rescue and sent to the hospital for treatment, and then died after the rescue was ineffective. At 5 p.m., the 6 emergency command center again received an alarm from the public that a woman suddenly encountered spring thunder on the way home, and was hit after she had no time to dodge, and the emergency doctor arrived at the scene and found that the patient was bruised all over his body, his heart was beating and breathing, and he performed cardiopulmonary resuscitation on the spot and sent him to the hospital for treatment, and then died after the rescue was ineffective.

Experts remind that when faced with sudden bad weather, cumulonimbus clouds thickening and blackening, thunderstorms coming at any time, be sure to keep a distance from trees, power poles, stagnant water, stay away from metal objects such as exposed water pipes and gas pipes outside buildings, and stay away from metal railings, railroad tracks and power equipment. Personnel working at height and at sea should stop working. If the public is struck by lightning while driving, do not get out of the car to check the condition of the car, and should wait until the thunderstorm has completely passed before getting out of the car.

What should I do if my companion is struck by lightning? Experts recommend taking the following first aid measures as soon as possible to help patients gain the most precious time:

1. Call for help in time and dial 120.

2. Ensure personal safety and prevent secondary lightning strikes. If the thunderstorm does not end, promptly transfer the patient to a safe place (dry place). For patients, unless they fall from a height or suffer a heavy blow to the body, there will be no serious fractures, paralysis or heavy bleeding. At this time, it is relatively safe to move the patient.

3. Immediately check the patient's breathing and heartbeat. The electrical burns caused by lightning strikes are only superficial phenomena, the most dangerous is damage to the heart and respiratory system, lightning strikes often cause victims to go into cardiac arrest, if you can't judge you can call 120 for help, if there is no heartbeat, breathing, CPR (cardiopulmonary resuscitation) can be performed under the guidance of the dispatcher until the ambulance arrives.

4. If the patient is conscious and has normal breathing and heartbeat, the patient should be allowed to lie flat on the spot, closely observe, examine the wound and treat it, while waiting for the arrival of 120 people.

【Popular Science】

Strong convective weather those things

Strong convective weather refers to severe weather with short-term heavy precipitation, thunderstorms, strong winds, tornadoes, squall lines, and hail.

Occurrence time: Strong convective weather occurs at different times in various places, the south comes earlier than the north, and strong convective weather in Guangdong may occur throughout the year.

Short-term heavy precipitation can be seen all year round, mostly in spring, summer and autumn.

Thunderstorms and winds mostly occur in spring, summer and autumn, and are relatively rare in winter.

Tornadoes generally occur during the spring-summer transition season or at the turn of summer and autumn (April-October), with the former being the former.

The squall line mostly occurs in the warm zone before the cold front in the spring-summer transition season, and the squall line often appears on the front edge of the typhoon, mostly from March to September.

Hail mostly occurs from February to May when cold and warm air converge intensely, and can also fall in the middle of summer during strong and persistent thunderstorms.

Disasters: Disasters caused by strong convective weather can be classified into three categories: wind damage, waterlogging damage and hail damage. When these disasters occur at the same time, the national economy and people's livelihood will be greatly affected.

Wind damage mainly includes tornadoes, squall lines and thunderstorms and high winds.

Waterlogging refers to short-term heavy precipitation.

Hail refers to hail.

Strong Convective Weather Defense Manual

▲Lightning disaster prevention

Pay attention to pay attention to the weather forecast through radio, television, mobile phone or Internet channels in a timely manner, and grasp the latest news of heavy rain.

Do not touch antennas, water pipes, barbed wire, metal doors and windows, building exterior walls, and should stay away from live equipment such as wires or other similar metal devices.

Do not stay on the high-rise platform, and do not enter isolated sheds, guard boxes, etc. in outdoor open areas.

Avoid climbing poles, towers and other columns, stay away from inclined poles and broken and drooping wires, etc., to prevent electric shock.

Do not ride a bicycle or electric car during heavy rain to prevent falling.

If you can't find a suitable lightning protection place, you should try to squat and lower your head, put your feet together and hold your hands on your knees, and never support the ground with your hands to avoid causing harm to the human body by the "step voltage" generated by lightning strikes.

▲Gale disaster prevention

High winds are winds with a wind force of 8 or greater. Gale warning signals (except typhoons) are divided into four levels, indicated by blue, yellow, orange and red.

Blue: Average wind strength above category 24 in 6 hours

Yellow: Average wind strength above category 12 in 8 hours

Orange: Average wind strength of 6 or more in 10 hours

Red: Average wind strength of 6 or more in 12 hours

Try not to go out, check and properly place outdoor items that are susceptible to high winds. When you must go out, you should try to stay away from large trees, billboards, high-voltage lines, scaffolding and temporary construction sheds, fences, etc.

People living in temporary houses should check and strengthen the house in time, close the doors and windows in the room, stay away from the window, to avoid strong wind sweeping sand and gravel to break the glass and hurt people, if there is a potential safety hazard, please evacuate to a safe place in time.

・If you are driving on a highway or overpass, you should slow down and drive into the nearest underground parking lot or hidden place if possible.


In the past three days, 21 rivers in Ganjian and Fujian and other places have experienced floods above the alarm

According to Xinhua News Agency, the Ministry of Water Resources issued a flood situation circular on 7 May, and since 5 May, heavy rainfall has occurred in most of China's Jiangnan, northern South China, and northwestern China. Affected by heavy rainfall, 5 rivers in Jiangxi, Fujian and other places experienced floods above the alarm, of which 21 rivers exceeded the protection and 3 small and medium-sized rivers experienced the largest flood since the actual record was measured.

Since the beginning of the flood, the flood situation of rivers has been generally stable, and heavy rains and floods have occurred in some areas in the south, and the flood situation has three characteristics:

- Precipitation is slightly higher overall. The average precipitation in the country is 70 mm, which is 6% more than the same period of the year, of which 5% to 2 times more in the eastern northwest, most of northern China, Huanghuai, northern Jianghuai and northeastern Hubei, and 3% to 9% less in southwest China, western South China, northeastern Jiangnan, northeast central and western northeast and western Xinjiang.

- The water level of major rivers is generally low. At present, the water level of the main stream of the middle and lower reaches of the Yangtze River, Dongting Lake and Poyang Lake is 1.52 meters to 2.77 meters lower than the same period of the year, the water level of the main stream of the middle and lower reaches of the Yellow River is 0.93 meters to 4.27 meters lower, and the water level of the Xijiang, Beijiang and Dongjiang rivers in the Pearl River Basin is 3.07 meters to 4.27 meters lower.

- Some small and medium-sized rivers are over-alert. Heavy rainfall in local areas caused floods above the warning level in 6 rivers in six provinces and autonomous regions, including Jiangxi, Hunan, Fujian, Zhejiang, Guangdong and Guangxi, 50% more than the same period in the past three years.

The relevant person in charge of the Department of Water and Drought Disaster Prevention of the Ministry of Water Resources said that in response to the recent heavy rain and floods in the southern region, the Ministry of Water Resources closely monitors changes in rainwater conditions, strengthens monitoring, forecasting and early warning, discusses and judges on a rolling basis, and issues notices to Zhejiang, Fujian, Jiangxi, Hunan, Guangdong, Guangxi, Sichuan and other places that forecast heavy rainfall in the form of "one province, one order", and deploys to do a good job in the prevention of floods and flash floods in small and medium-sized rivers, the safety of reservoirs, and the inspection and defense of dikes, especially in Jiangxi and other places. The Ministry of Water Resources promptly dispatched a working group to the scene to guide the prevention and response of heavy rain and floods, the dispatch of water projects and the handling of dangerous situations.