A mild heatwave is sweeping parts of the country with sporadic rains doing little to ease the mercury levels, the Met office said on Thursday.

“Mild heatwave is sweeping through the districts of Rajshahi, Pabna, Sirajgonj, Khulna, Satkhira, Jashore, Chuadanga, Cumilla and Bhola, and it may abate from some places,” the weather department said in its bulletin.

Besides, Light to moderate rains or thunder showers accompanied by temporary gusty winds is likely to occur at most places over Rangpur, Mymensingh and Sylhet divisions; at a few places over Rajshahi, Dhaka and Chattogram divisions and at one or two places over Khulna and Barishal divisions with moderately heavy to heavy falls at places over northern part of the country," it added.

Rainfall activity may continue.

Read: Heat wave likely to prevail two more days, says weather expert

Day temperature may fall slightly and night temperature may remain nearly unchanged over the country, as per the bulletin.

The weather office recorded the highest rainfall of 173mm in Tetulia of Rangpur division in 24 hours till 6am on Thursday.

The highest temperature was recorded at 37 degrees Celsius in Tarash of Rajshahi division, while the lowest temperature was recorded at 22.8 degrees in Rajarhat of Rangpur division.

The axis of monsoon trough runs through Rajasthan, Punjab, Haryana, Uttar Pradesh, Bihar, West Bengal to Assam across central part of Bangladesh.

One of its associated troughs extends up to the Northwest Bay.

Monsoon is fairly active over Bangladesh and weak to moderate elsewhere over North Bay, reads the bulletin.