Port Huron fire crews responded to a structure fire overnight in the 2400 block of Military Street in Port Huron. Batallion Chief James Hayes tells WPHM one person was in the home when the blaze broke out around 1am this morning. The lone occupant escaped unharmed. Two firefighters were treated at the scene for exhaustion and another was taken to an area hospital for evaluation. The two story dwelling located on the St. Clair River is believed to be a total loss. Hayes says a neighboring home also sustained damage from the fire. The Port Huron Fire Department was assisted by crews from Marysvile, Fort Gratiot, and Port Huron Township. Investigations into the cause are underway.