Five hundred homes — and some 1,500 people — were under evacuation orders as the wind-driven Mann fire broke out along the Santa Ana River in Norco, reports The Press-Enterprise.
More than 200 firefighters fought the fast-moving fire.
The Mann fire quickly grew as winds pushed it to 100 acres. The fire was 20% contained and 175 acres, with forward progress stopped around 3:30 p.m., fire officials said. Evacuation orders remained in place.