Thailand: Heatwave forecast to persist across much of the country through at least May 7 /update 1

High temperatures are likely to persist across much of Thailand through at least May 7. Temperatures of up to 44.2 C (111.6 F) have been recorded in parts of northern Thailand in recent days, and the excessive heat is expected to continue. As of April 30, the Thai Meteorological Department has warned that hot-to-very hot conditions are likely particularly over northern regions over the coming days. Authorities have reported energy demand has surged to record levels amid the heatwave; the additional strain on the power grid could lead to supply issues during the extended period of high temperatures.

The following maximum temperatures are forecast in the respective regions of Thailand over the coming days:

• Northern: 38-44 C (100-111 F) April 30-May 2 and 37-42 C (99-108 F) May 3-6.

• Northeastern: 39-44 C (102-111 F) April 30-May 2 and 36-41 C (97-106 F) May 3-6.

• Central: 38-44 C (100-111 F) April 30-May 3 and 36-40 C (97-104 F) May 4-6.

• Eastern: 34-43 C (93-109 F) April 30-May 2 and 32-40 C (90-104 F) May 3-4.

• Southern (East Coast): 33-41 C (91-106 F) April 30-May 6.

• Southern (West Coast): 34-38 C (93-100 F) April 30-May 6.

• Bangkok Metropolitan: 35-42 C (95-108 F) April 30-May 2 and 34-39 C (93-102 F) May 3-6.

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.