The Karen Fire burned 250 acres in Jurupa Valley Saturday while firefighters managed to reach 50% containment of the rapidly growing blaze, authorities said.
The brush fire was reported near Sierra Avenue and Karen Lane just after 3 p.m. but grew to 150 acres by 6:15 p.m., according to Cal Fire/Riverside County Fire Department.
About two hours later, officials said the fire was 250 acres but its containment was up considerably to 50%. Firefighters were expected to remain at the scene overnight to improve containment.
While it broke out in Riverside County, the wildfire also put authorities in neighboring San Bernardino County on high alert as it moved toward more populated areas there.
Capt. Fernando Herrera of the Cal Fire/Riverside County Fire Department told the Orange County Register that 20-mph winds carried the blaze toward housing developments along Armstrong and Locust Avenue in Bloomington, near Fontana.
He told the newspaper the homes did not appear to be in any immediate danger.
No evacuations have been ordered and no injuries reported.
Sierra Avenue from Jurupa Avenue through the county line as well as Armstrong Road, from 7th Street through the county line, are shut down, according to local fire officials. The roads are closed in both directions.
Correction: A previous version of this story incorrectly stated the day of the fire. The post has been updated.