China: Heatwave likely to persist in northwestern, eastern, and central regions through at least Sept. 6 /update 2

High temperatures will likely persist across parts of northwestern, eastern, and central China through at least Sept. 6. As of early Aug. 27, the China Meteorological Administration has issued a yellow high-temperature warning (the second lowest level on a four-tier scale) across most of the affected area. The highest temperatures of more than 40 C (104 F) are forecast over central and western Chongqing and southeastern Sichuan, while temperatures of 37-39 C (99-102 F) are likely across parts of Chongqing, eastern Fujian, eastern Guizhou, western and south central Hunan, southern Shaanxi, eastern Sichuan, and most of Zhejiang. High temperatures in the Sichuan Basin, Jianghan, western Jianghuai, central and western Jiangnan, and central and southern Shaanxi are forecast to persist through at least Sept. 6. 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.