Firefighters in southeastern Wisconsin had to deal with a major fire at a factory early Sunday morning. No workers were on the job at the time and the only reported injury was a firefighter who suffered heat exhaustion. His name wasn’t released. Several streets in Lake Geneva around the Wisconsin Precision Casting plant were closed to traffic. A hazmat crew was called because of the chemicals stored in the building. Lake Geneva fire officials say moderate damage was done to one part of the factory.