The district records 40.8 degrees Celsius, the highest this seasons
Police said the man, around 25 years old, is yet to be identified.
Locals at Palegram village reported of a body on Tuesday morning, said Banshkhali police OC Md Alamgir Hossain.
"The body was found lying in a field. His neck and legs were trussed," he told bdnews24.com.
The OC suspected that he was murdered somewhere else and then dumped in the field.