Myanmar: High temperatures forecast to persist across much of the country through at least May 21 /update 1

High temperatures are forecast to persist across much of Myanmar through at least May 21. Temperatures over 40 C (104 F) have been recorded in many parts of the country in recent days, including highs of 44.4 C (111.9 F) in Chauk and 44.1 C (111.3 F) in Magway May 14. Myanmar's Department of Meteorology and Hydrology has observed temperatures of 5-6 C (9-11 F) above the May average in Naypyitaw, Sagaing, Mandalay, Bago regions and Kachin, Kayin, Mon states May 14-15 and 2-4 C (4-7 F) above the May average across much of the rest of the country, with the exception of Kachin State. Officials have warned of a slight increase in temperatures in Naypyitaw, Lower Sagaing, Mandalay, Magway regions and Shan and Kayah states over the coming days. Temperatures of 34-44 C (93-111 F) are forecast across much of the country May 16-18.

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.