After a slight decrease from severe levels, the mercury is hovering around 40 degrees Celsius in most regions
Police arrested ten Islami Chhatra Shibir activists from Lohagarha and Satkaniya area early on Thursday.
Shibir is the student affiliate of Jamaat-e-Islami.
Meanwhile, another Shibir activist was detained in the morning at the city's Khulshi area when the party was trying to take out a procession.