Firefighters are increasing containment of three wildfires that have burned thousands acres this week and triggered evacuation orders and warnings for tens of thousands of residents in Ventura and Riverside counties.

A rapidly spreading wildfire in California has sparked evacuation orders, and several celebrity homes are at risk.

A wildfire that started Monday morning prompted evacuation orders in Simi Valley. The Sandy Fire was reported around 10 a.m., and the first evacuation was called in barely half an hour as it threatened hillside homes.

Bain Fire initially started 11:24 a.m. May 19 at Limonite Ave and Bain Street, Jurupa Valley in Riverside County, California. After being active for 43 hours, it has burned 1,456 acres. A fire crew of 100 succeeded in containing 39% of the fire as of Thursday morning.

Photos showed structures ablaze in Simi Valley, California.

A fast-moving wildfire in Simi Valley has triggered evacuation orders for multiple zones, threatening homes.

A series of active wildfires burning across California have torched more than 22,000 acres combined as firefighters battle dangerous conditions in at least six major blazes stretching from Santa Barbara County to San Diego County.

A fast-moving wildfire in Ventura County continued to grow on May 19, prompting evacuations in Simi Valley, California.

California fire coordinators are offering the public a unique look at the aerial battle against the Sandy Fire in Simi Valley, which burned at least two structures and forced widespread evacuations on Monday.