Sandy Fire Threatens Santa Susana Nuclear Site in Southern California

The Sandy Fire in Simi Valley, California, has burned over 2,215 acres and is 30% contained as of May 21, 2026. The fire is near the Santa Susana Field Laboratory, a former nuclear reactor site, prompting air quality monitoring due to potential contamination risks. Evacuations are in place for nearby communities as the fire continues to threaten the area. Fire officials report that air quality alerts have been issued due to fine particle pollution. The Ventura County Fire Department is actively monitoring the situation and has stated that the fire has not yet reached the laboratory site. Boeing, which owns the facility, has evacuated personnel and is coordinating with local authorities. The Department of Toxic Substances Control is also involved in monitoring efforts to safeguard public health. Although the site is in a historically wildfire-prone area, officials assert that the risk of radiation release remains low based on recent measurements.

Key Points: • The Sandy Fire has burned over 2,215 acres and is currently 30% contained. • Air quality monitoring is underway due to the fire's proximity to a former nuclear reactor site. • Evacuations are in effect for communities near the fire, with health officials issuing air quality alerts.