Vietnam: High temperatures forecast to persist across much of the country through at least May 7 /update 5

High temperatures are forecast to persist across much of Vietnam through at least May 7. As of April 22, the Vietnam National Centre for Hydro-Meteorological Forecasting (NCHMF) has issued a heatwave warning for most of the country. Temperatures of 36-39 C (97-102 F) with relative humidities of 35-40 percent are forecast from Thanh Hoa to Phu Yen provinces, and temperatures of 35-37 C (95-33 F) with relative humidities of 45-50 percent are likely in northwestern, northern, southern, and Central Highlands regions April 22. Temperatures of 35-37 C (95-33 F) with relative humidities of 45-50 percent are forecast across the Northwest, Central Highlands, and South regions as well as from Nghe An to Phu Yen provinces April 23, with higher temperatures of 36-38 c (97-100 F) from Quang Binh to Quang Ngai provinces.

Officials have issued a level 1 warning of natural disaster risk due to the forecast heat. High temperatures are expected to persist across the Northwest, Central Highlands, and South regions and from Thanh Hoa to Phu Yen provinces through at least May 7, with temperatures intensifying from April 25.

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.