After a slight decrease from severe levels, the mercury is hovering around 40 degrees Celsius in most regions
He was admitted to the Rajshahi Medical College and Hospital on Thursday morning.
Hospital Director Brig Gen AKM Nasir Uddin said the 40-year-old’s windpipe had been badly damaged.
Over a hundred people have been killed during the BNP-led alliance’s agitation since Jan 5, mostly in fire bombing.
Sheikh, a truck driver’s assistant, was returning to Shibganj when blockade campaigners attacked the potato-laden truck with petrol bombs.
Driver Firoz Uddin, 30, and businessman Shaheb Ali, 40, were injured and the merchandise destroyed, Sheikh’s uncle ‘Ismail’ said.