San Diego Firefighters expect to fully contain a fire today that has scorched 150 acres in a San Diego canyon. The fire started yesterday afternoon in Rancho Penasquitos canyon and was quickly fanned by 10-to-15 mile-per -hour winds. The flames came within a half-mile of 200 homes, forcing residents to evacuate.They were allowed to return home last night. Fire officials say no structures were damaged. However, a U-S Forest Service vehicle en route to the fire was involved in an accident in Poway, injuring five people. At least two were in critical condition. Also one firefighter was treated for heat exhaustion and released back onto the fire lines. The cause of the fire is under investigation.