After a slight decrease from severe levels, the mercury is hovering around 40 degrees Celsius in most regions
Four others were injured in the blast that took place in the Upazila's Chaturi Choumuhoni area around 2:30 pm on Thursday, according to police.
The casualties could not be identified immediately but the injured have been admitted to Chattogram Medical College Hospital, said Anwara Police OC Dulal Mahmud.