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PARAMOUNT, Los Angeles County, Calif., Oct. 21, 2026 — A multi-vehicle crash blocked a lane of eastbound Interstate 105 near Paramount Boulevard Tuesday morning, October 20, and left at least one person injured, according to the California Highway Patrol.
The crash was first reported as a collision with unknown injuries before the California Highway Patrol updated it to a confirmed-injury crash, according to the agency's incident log. The log describes a Chevrolet SUV, a Honda and a Dodge involved.
Los Angeles County Fire Department personnel responded to treat the injured occupant. One vehicle involved sustained front-end damage severe enough to require a tow, and the crash blocked the number 3 lane of eastbound I-105 just east of Paramount Boulevard for a time Tuesday morning.
A Freeway Service Patrol unit was dispatched to assist with the scene and later closed out its portion of the response.
The California Highway Patrol's investigation is ongoing. We hope those who were hurt recover quickly.
More on Crashes in Paramount, CA
This multi-vehicle crash happened at Interstate 105 and Paramount Boulevard in Paramount, CA. We cover crashes across Los Angeles County as they're reported, and you can browse the latest in our Los Angeles County accident reports.
Frequently Asked Questions
Why does following distance matter so much on freeways?
Keeping enough space between vehicles gives drivers time to react to sudden braking ahead. On fast-moving freeway lanes like I-105, a short following distance is a common factor in chain-reaction impacts.
Do crashes like this often trigger a second collision?
Yes. A disabled or slow-moving vehicle left in a travel lane can catch oncoming traffic off guard, especially in the minutes before responders arrive and lanes are blocked off.
Why are multi-vehicle crashes harder to investigate than single-car wrecks?
Investigators have to reconstruct the order of impacts across several vehicles, often relying on damage patterns, witness accounts and any available video, which can take longer than a simpler one-car crash.
What usually causes pile-ups involving several vehicles?
Common factors include sudden braking, lane changes without enough clearance, distracted driving and reduced visibility, though a cause is not confirmed in this case.
What to Do After a Multi-Vehicle Crash in Paramount, CA
If you're involved in a multi-vehicle crash, move to a safe spot off the travel lanes if your vehicle is drivable, and turn on hazard lights to warn oncoming traffic. Call 911 and wait for a report from responding officers even if injuries seem minor at first, since some symptoms take hours to appear. Get checked by a medical provider as soon as possible, and keep records of any treatment. Exchange information with other drivers involved, and if possible, take photos of vehicle positions and damage before vehicles are towed. A copy of the official CHP report can help later when sorting out insurance claims.
