More than 50 firefighters responded to a house on fire in the unit block of Oak Avenue in Gaithersburg, Maryland, early Sunday.

A man was rescued and transported from the single-story family home with “critical life-threatening injuries,” according to Pete Piringer, chief spokesperson for Montgomery County’s fire and rescue service.

The fire started around 1:30 a.m. in the first floor kitchen around a baseboard heater that ignited “other nearby combustibles,” Piringer said.

There was “no smoke alarm evident,” in the home, he said.

The fire caused about $400,000 in damage to the home, according to Piringer.

See a map of the location of the fire below.