Bangladesh: Heatwave conditions forecast to persist over much of the country through at least May 4 /update 4

High temperatures are forecast to persist across much of Bangladesh through at least May 4. The Bangladesh Meteorological Department has issued a heatwave alert message May 2 advising that the prevailing heatwave over Khulna, Rajshahi, and Rangpur divisions and the western part of Dhaka Division will continue over the next 48 hours. Levels of discomfort amid the heatwave may be exacerbated due to increased moisture incursion. Very severe heatwave conditions are forecast over Chuadanga, Jashore, Khulna, Pabna, and Rajshahi districts and severe heatwave conditions over Faridpur, Gopaljong, and Tangail districts and the rest of Khulna Division May 2. Mild to moderate heatwave conditions are likely across most of the rest of Bangladesh but may start to abate in eastern regions. Temperatures may fall slightly across parts of the country May 3-4 as the heatwave starts to abate before rainfall and thunderstorms over much of Bangladesh May 5-9 lead to a further drop in temperatures. At least ten people have died, and five others have been hospitalized across Bangladesh due to heatstroke since April 22. Primary and secondary schools are due to resume classes May 4, having been closed in recent days due to the extreme heat.

The extended period of oppressive heat and dry conditions may produce ideal circumstances for wildfire growth throughout the region. Heatwaves pose a threat to 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. Relatively healthy individuals, especially those working outdoors or using mass transit, may also face health risks during significant heatwaves. The lack of air conditioning and cramped vehicles, particularly during rush hour, may lead to dehydration and other health issues in some passengers. The extended period of oppressive heat and dry conditions may lead to wildfires.

Very high temperatures may warp rail tracks and force passenger and freight trains to operate at reduced speeds. Road surface damage is also possible, 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 airports in the region, 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.