The man was taken to the burn center at Bridgeport Hospital. A firefighter and a woman were also treated for minor injuries.
One man was severely burned and two people were treated for smoke inhalation in the third fire in Plainville in 12 hours.
When firefighters arrived at a burning home on Washington Street around 2:30 a.m. on Monday, a man was trapped inside on the first floor.
Firefighters were able to save him, but he was severely burned and taken to the burn center at Bridgeport Hospital.
The man's name and age have not been released. Neighbors said he was a retired Navy veteran.
A firefighter and a woman who escaped the home were treated for smoke inhalation.
Plainville Fire Chief Ray Swanson said the Farmington fire department was brought in for back up because the heat made this a tough fire to put out.
“This is our third fire today. We’ve had three other structure fires, our guys are pretty whooped right now, so the heat is adding to it,“ Swanson said.
Lightning strikes are believed to have caused the other two fires, which started in basements on Maiden Lane and West Main Street.
The American Red Cross is helping three adults who were displaced in a fire Maiden Lane.
The Washington Street fire was reported after storms moved through, but weather hasn’t been ruled out as a cause.
The fire department is investigating.