CARLSBAD, Calif. — At least a half-dozen wildfires scorched San Diego County on Wednesday, forcing thousands to flee burning homes and prompting the closure of a college campus and Legoland California. No major injuries were reported.Firefighters contended with temperatures approaching 100 degrees and gusty winds as they tried to contain flames fueled by brush and trees left brittle by drought. Two firefighters suffered minor injuries — one heat-related and one from smoke inhalation.The worst of the fires was in the coastal city of Carlsbad, about 30 miles north of San Diego and home to Legoland. The park was closed because of a power outage caused by the fire.The city’s schools also were closed, and officials expected they wouldn’t reopen until next week. Carlsbad Mayor Matt Hall said the blaze consumed an eight-unit condominium complex, as well as damaged eight homes and two businesses. Thousands were asked to evacuate their homes.As the flames surged, a steady stream of residents stopped at a roadblock on a four-lane thoroughfare as they tried to return home to collect valuables.