Bangladesh Meteorological Department (BMD) has issued a heat alert for four divisions, including Dhaka.
"The prevailing heatwave over Rajshahi, Khulna, Dhaka, and Barishal divisions may continue and spread for the next 72 hours starting from Wednesday," it said in its bulletin this evening.
"Due to the increase in moisture incursion, the discomfort may increase," it added.
Besides, rain or thundershowers, accompanied by temporary gusty wind, is likely to occur at one or two places over the Mymensingh and Sylhet divisions and the districts of Kishoreganj and Brahmanbaria, with hail at isolated places.
The weather may remain mainly dry with a temporary partly cloudy sky elsewhere over the country, it added.
Daytime temperatures may rise slightly, and nighttime temperatures may remain nearly unchanged throughout the country.
The country’s highest temperature was recorded at 38.5 degrees Celsius in Chuadanga and Ishurdi, added the bulletin.