China: Heatwave likely to persist in central, eastern, and southeastern regions through at least Sept. 12 /update 3

High temperatures will likely persist across parts of central, eastern, and southeastern China through at least Sept. 6. As of early Sept. 5, the China Meteorological Administration has issued a yellow high-temperature warning (the second lowest level on a four-tier scale) across the affected area. The highest temperatures of more than 40 C (104 F) are forecast over northern and western Chongqing and eastern Sichuan Sept. 5, while temperatures of 37-39 C (99-102 F) are likely across parts of southern Anhui, Chongqing, northern Guangxi, northeastern Guizhou, southwestern and eastern Hubei, western and northeastern Hunan, central and northern Jiangxi, eastern Sichuan, and western Zhejiang. Temperatures of 35-36 C (95-97 F) are expected over much of the rest of the affected area. High temperatures are forecast to persist across the affected regions through at least Sept. 12. Officials could upgrade, rescind, or expand the coverage of weather alerts over the coming days.

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.

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 vehicles, 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.