California Today

Sandy Fire Threatens Former Nuclear Lab, Triggers Air Monitoring

21 May 2026 10:35

The Sandy Fire in Simi Valley has burned 2,115 acres and is 30% contained, with authorities monitoring a former nuclear research site. - Fire started Monday near a residential area in southeastern Simi Valley.

- At least one home destroyed; over 44,000 evacuated in Ventura County. - Air monitoring deployed near contaminated site where rocket engines and nuclear reactors were tested.

- Improved weather expected to aid containment efforts. The fire continues to impact air quality across the LA Basin and surrounding areas, with warnings for sensitive groups.

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AdvanceSimi ValleyAgoura HillsCalabasasfireair qualityevacuationnuclear