Mobile Firefighters responded to the first of three house fires at approximately 1:53 a.m. Thursday morning.

Firefighters encountered heavy fire and smoke upon arrival to the scene at 2422 Elsevier Street..

Both occupants escaped without apparent injuries. One of the occupants told Mobile Fire-Rescue investigators that his female pit bull woke him up and alerted him to the fire enabling him to escape out a window. Unfortunately the dog did not escape the fire. Her puppy is missing.

The fire appears to have originated in the living room-dining room area and appears to have been caused by a space heater.

The house was totaled with a damage estimate of approximately $40,000.

Engines 12, 14, 23; truck 17; rescue 14 and District Chief Steve Zirlott responded to the call.

The Bureau of Fire Prevention is conducting the investigation.