Sandy Fire initially started 10:50 a.m. May 18 on Off Sandy Ave, Simi Valley in Ventura County, California. It has burned 2,115 acres after being active for two days. A crew of 859 firefighters effectively contained 22% of the fire as of Wednesday evening.

Crews remain positioned in communities throughout the Simi Valley area to be able to respond to any flare-ups or hot spots that might spark.

Hundreds of firefighters continue to tackle the Sandy Fire in Simi Valley on May 21, three days after it first ignited.

The Sandy Fire has burned over 2,141 Acres and is 40% contained as of Friday, May 22, according to the California Department of Forestry and Fire Protection

On Tuesday, fire officials said the Sandy Fire had experienced significant growth due to shifting winds, steep terrain and canyon-driven fire behavior.

Hundreds of firefighters continued to battle a fire in Simi Valley on Wednesday, May 20. Here are the updates.

The Sandy Fire has spread dangerously close to the Santa Susana Field Laboratory - site of a catastrophic nuclear accident in 1959.

The Ventura County Fire Department said air quality monitoring is being conducted around the fire's perimeter due to the proximity to the Santa Susana Field Laboratory.

Firefighters are racing to keep flames away from the Santa Susana Field Laboratory, a former nuclear and rocket testing site.