A widespread heatwave affected 37 districts across Bangladesh on Sunday as rainfall decreased nationwide, according to the Meteorological Department. The agency forecast that the hot and humid conditions could persist for the next four days, with daytime temperatures remaining steady and nighttime temperatures likely to rise further. The highest temperature recorded was 37.5 degrees Celsius in Syedpur, Nilphamari, while Dhaka reached 36.4 degrees Celsius.

The forecast indicated that only parts of Chattogram and Sylhet divisions, along with a few areas in Mymensingh, Rajshahi, Khulna, and Barishal, might experience light to moderate rain or thunderstorms. Elsewhere, the weather is expected to remain mostly dry with partly cloudy skies. The department noted that the southwest monsoon could advance to the Teknaf coast within five days, increasing rainfall and bringing relief from the heat.

Meteorologists said that once the monsoon becomes active around June 5, rainfall is expected to rise gradually, signaling the onset of the rainy season across the country.