Overview
- The Grand Fire, which ignited Wednesday evening near Grand Avenue Park, grew to about 30 acres and threatened nearby homes.
- Incident commanders declared a second alarm as crews ordered Level 3 evacuations for Mill Stream, Falling Star, Valley View and Sweet Grass, and opened a pet‑friendly shelter at the Chino Hills Community Center.
- By late Wednesday, crews held the blaze at roughly 30 acres after cooler, more humid night conditions slowed its spread.
- Evacuation orders and warnings were later lifted, and Grand Avenue remains closed near the park as firefighters work hotspots and mop‑up.
- Chino Valley fire officials said a Tesla rollover likely sparked the blaze, which threatened about 650 homes and drew more than 200 firefighters, 20 engines and three helicopters; one firefighter suffered minor injuries.