China: Heatwave likely to persist in multiple regions through at least Aug. 26 /update 5

Event

High temperatures are forecast to persist across southern, central, and eastern China through at least Aug. 26. The ongoing heatwave has persisted for more than 68 days. As of early Aug. 22, the China Meteorological Administration has issued a red (highest level on a four-tier scale) high-temperature warning across Anhui, Chongqing, Fujian, southeastern Gansu, central and northern Guangdong, central and northern Guangxi, eastern and northern Guizhou, Henan, Hubei, Hunan, most of Jiangsu, Jiangxi, southern Shaanxi, southern and western Shandong, Shanghai, central and eastern Sichuan, northeastern Yunnan, and Zhejiang provinces; temperatures of more than 35 C (95 F) are possible. The highest temperatures of 35-39 C (95-102 F) are forecast over southeastern Anhui, Chongqing, Fujian, most of Hubei, northern Hunan, northern Jiangxi, southern Shaanxi, eastern Sichuan, and central and western Zhejiang provinces. The red high-temperature warning has been in place for at least 10 consecutive days. Officials could upgrade or expand the alerts over the coming days as conditions change. Forecast models indicate that the high temperatures are likely to persist over the affected area through at least Aug. 26.

Sichuan Province has extended the industrial power cuts across most cities through at least Aug. 25 to prioritize residential power supply. Officials in Dazhou City imposed 3-hour power cuts from Aug. 17. High temperatures and low rainfall have reduced hydropower generation in the province as energy demand increased due to the increased use of air conditioning. Further power rationing is possible.

Chongqing Province has also ordered factories to suspend operations through at least Aug. 24 to conserve energy. Reports indicate that Anhui, Jiangsu, and Zhejiang provinces have also issued power curbs for industrial users.

Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for wildfire growth throughout the region. Heatwaves also threaten vulnerable groups - such as the elderly, children, pregnant women, and those with respiratory illnesses - due to the increased possibility of heat stroke or heat exhaustion during prolonged exposure to high temperatures. These health risks could also extend to relatively healthy individuals during significant heatwave events. In addition to significantly impacting athletes and those who work outdoors, high temperatures can cause problems for people using mass transit. The lack of air conditioning and cramped vehicles during rush hour may lead to some passengers' hospitalization.

Transport and Utilities
Very high temperatures may damage road surfaces, and overheated vehicles may worsen traffic problems in urban areas where congestion is already a problem. Commercial trucking disruptions might occur, as very high temperatures put more stress on engines, making tire blowouts more common. Major flight disruptions are unlikely at regional airports, but general aviation disruptions are possible, and some airfreight carriers could reduce cargo loads. High temperatures could lead to an increased demand for electricity, which might trigger localized brownouts or blackouts, exacerbating hazardous conditions when air conditioning is no longer possible.

Advice

Monitor local media for weather updates and related advisories. During heatwaves, remain indoors in air conditioning when possible. If outdoor activities are necessary, frequently rest in shaded areas; avoid activity during the hottest times of the day. Stay well-hydrated by drinking plenty of fluids. Avoid alcoholic beverages, which are dehydrating; drink bottled or boiled water. Wear loose-fitting, light-colored clothing. Cotton fabrics are more cooling than synthetics. Promptly seek medical attention if signs of heat exhaustion or heat stroke develop. Charge battery-powered devices in the case of prolonged electricity outages.

Resources

China Meteorological Administration