Firefighters were battling a 27-acre vegetation fire in Lake Elsinore Monday.
The blaze, named Grand Fire, burned approximately 40 acres as of 3:45 p.m. near South Main Divide Road in an unincorporated area west of Lake Elsinore in Riverside County, fire officials said. Due to updated mapping, however, the acreage was changed to 27, according to CAL Fire.
The flames were first reported just before 2 p.m., according to the Riverside County Fire Department. The blaze was 60% contained as of 9:20 p.m. and resources were to remain on scene throughout the night.
As of 2:40 p.m., when the fire was just at 5 acres, no structures were threatened, fire officials said.
At least 175 firefighters and one helicopter responded to the scene to put out the fire.
It was not yet clear was caused the fire.
The National Weather Service issued a red flag warning effective Sunday night through Monday, with 25 to 40 mph winds forecast to gust 40 to 60 mph amid dry and hot conditions. However, the warning was not in place in Riverside County Monday evening, despite those in place in neighboring Los Angeles County.