Australia: High temperatures likely to persist over parts of the country through at least Dec. 14 /update 3

High temperatures are likely to continue across parts of Australia through at least Dec. 14. The heat that has been persisting across much of mainland Australia is expected to gradually become more confined to eastern, southeastern, far northern, and far western regions over the coming days. The Australian Bureau of Meteorology (BOM) has forecast extreme heatwave conditions (the highest level on a three-tier scale) across parts of eastern South Australia and western New South Wales Dec. 8, central New South Wales Dec. 8-10, and far northern Queensland Dec. 9-12. Severe and low-intensity heatwave conditions are expected in central regions Dec. 8-9, far western regions Dec. 8-12, and across parts of eastern, southeastern, and far northern Australia through at least Dec, 14. Widespread temperatures of 40-45 C (104-113 F) are expected across the affected regions, with localized higher maximums.

The extended period of oppressive heat and dry conditions may produce ideal circumstances for bushfire growth throughout the region. The BOM has issued multiple fire weather warnings across parts of the country and fire bans have been issued in several regions. 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.