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CLAREMONT, Los Angeles County, Calif., Oct. 1, 2026 — Several people were hurt in a multi-vehicle crash early on Wednesday morning, September 30, on westbound Interstate 10 near Indian Hill Boulevard, according to the California Highway Patrol. The wreck blocked lanes of traffic for hours during the morning commute.
The California Highway Patrol said the crash was first reported shortly after 5 a.m. and initially involved three vehicles, including a passenger car and a sports car, blocking the two middle lanes of westbound I-10 between Indian Hill Boulevard and Garvey Avenue. Early reports from the scene indicated no injuries in that initial collision.
Within minutes, dispatch logs show a separate collision involving a black Mustang and a dark-colored BMW SUV blocking up to four lanes near Indian Hill Boulevard. The driver of the Mustang was reportedly out of the vehicle, while the driver of the BMW remained inside, and an ambulance was requested as a precaution. Los Angeles County Fire Department crews responded and transported multiple people from the scene to Pomona Valley Hospital.
Fire personnel were reported blocking additional lanes while managing the scene, and visibility issues were noted from the eastbound side of the freeway. The Mustang sustained major front-end damage, the CHP reported, and tow trucks were called to clear multiple vehicles from the roadway. Not all lanes were confirmed clear until vehicles were moved to the right shoulder around 6 a.m.
The circumstances that led to the initial three-vehicle collision and the second crash involving the Mustang and BMW remain under investigation. It has not been confirmed whether the two incidents are related.
We wish the injured a complete and speedy recovery.
Why Highway Speeds Turn Small Collisions Into Multi-Vehicle Pile-Ups
A crash that begins with one car clipping another rarely stays that way on a freeway. At highway speeds, the distance a driver needs to react and stop stretches out fast, so even a short delay in braking can turn a two-car tap into a chain reaction involving three, four, or more vehicles arriving at the same spot within seconds of each other.
Darkness and limited visibility make this worse. Early morning hours bring glare, headlight blind spots, and drivers whose attention has not caught up with the road ahead. When a lane suddenly blocks ahead, cars approaching from behind often have only a second or two to recognize the hazard, and not everyone reacts in time.
According to the National Highway Traffic Safety Administration, 23,959 passenger-vehicle occupants were killed in motor-vehicle traffic crashes in 2023. Many of those crashes started small before speed and following distance turned them into something larger. Once a lane or two closes on a busy interstate, the risk compounds: each additional car arriving at speed increases the likelihood of an impact.
Frequently Asked Questions
Why do chain-reaction crashes happen?
They typically start with one collision or a stopped vehicle that other drivers don't see in time to stop safely, especially at highway speeds where stopping distances are long and reaction time is limited.
How can drivers avoid being caught in a pile-up?
Keeping a safe following distance, reducing speed in heavy traffic or low visibility, and staying alert for brake lights or hazard flashers ahead can give drivers more time to react before a crash develops.
What should I do if I'm stopped near a crash on the highway?
Turn on hazard lights, stay inside the vehicle if it's not safe to exit, and move as far from traffic lanes as possible. If you can do so safely, move to the shoulder rather than remain in a travel lane.
How does fog or low visibility contribute to pile-ups?
Reduced visibility shortens the distance at which drivers can spot a hazard, which can turn a single stopped vehicle into a multi-car collision as following traffic arrives before it can slow down.
What to Do After a Car Accident in Claremont, CA
Anyone involved in a highway crash should move to a safe location if possible and call 911 to report any injuries or hazards that are blocking traffic. Even if injuries seem minor, a medical evaluation afterward is worth doing, since some injuries from a collision don't show symptoms right away.
Document the scene if it's safe to do so, including vehicle positions, damage, and any visible road conditions that may have played a role. Exchange information with other drivers involved and file a report with the California Highway Patrol if one is not already underway. Keeping copies of medical records and any official incident reports can help with insurance claims later.
