The Dorset Fire and Rescue Service says firefighters rescued the man from his home and extinguished the kitchen blaze.
The fire destroyed the appliance along with the two pairs of underwear and socks inside it, and caused smoke damage to the apartment in Weymouth, a town on England’s southwest coast.
“The fire safety message here is to never put clothing of any kind in the microwave or an oven to attempt to dry them,” the Dorset firefighters said in a statement.