Road hazards
Blowing sand and dust storm crashes in the Coachella Valley
When blowing sand or dust cuts visibility, California drivers must slow to a speed that is safe for the conditions (Vehicle Code § 22350) and use headlamps when they cannot see a vehicle 1,000 feet away (Vehicle Code § 24400). The National Weather Service warns that dust storms can cause chain-reaction pileups.
Why the Coachella Valley gets blowing sand
The South Coast Air Quality Management District describes the valley's conditions this way: In the Coachella Valley, drought, high winds, blowing sand, flooding and temperature inversions all affect air quality. [source] Most of the central Coachella Valley floor has been designated a Blowsand Hazard Area by the Coachella Valley Association of Governments and Riverside County. [source]
Four weather patterns cause high-wind dust events in the Coachella Valley: winds forced through the San Gorgonio Pass, storm fronts, thunderstorm downbursts and outflow winds, and strong Santa Ana winds. [source] Caltrans District 8, which covers the county's state highways, reports: Wind gusts on Interstate 10 in the Palm Springs area frequently cause high-profile vehicles to be diverted or stopped when gusts reach 55 miles per hour. [source]
What the National Weather Service tells drivers
| Dust Storm Warning | A Dust Storm Warning is issued when blowing dust or sand cuts visibility to 1/2 mile or less, with winds of 30 miles an hour or more. [source] |
|---|---|
| The danger | Blowing dust can reduce visibility quickly and cause chain collisions and large pileups. [source] |
| If you see dust ahead | If dense dust is blowing across or approaching the road, pull as far off the pavement as possible, stop, turn off your lights, set the emergency brake and take your foot off the brake pedal so the tail lights are not lit. [source] If you cannot pull off, drive at a speed suitable for the visibility, turn on your lights, sound the horn occasionally, use the painted center line as a guide and look for a safe place to pull off. [source] Never stop in a travel lane. [source] |
| Why lights off | Drivers following the lights of a car parked off the road have left the roadway and hit the parked car, so the NWS says to turn all lights off once you are parked off the road. [source] |
Before you drive through the Pass or the valley on a windy day, check conditions. Current state highway conditions: call 1-800-427-7623 or check Caltrans QuickMap. [source]
The rules that decide fault
Speed for conditions. The basic speed law (Vehicle Code § 22350) forbids driving faster than is reasonable for weather and visibility. A driver who plows into stopped traffic inside a dust cloud usually cannot defend the speed by pointing to the posted limit. See our explanation of the basic speed law.
Headlights. California requires headlamps in "inclement weather," which includes any condition that keeps a driver from clearly seeing a person or vehicle 1,000 feet away (Vehicle Code § 24400). The NWS advice to turn lights off applies only after you are parked completely off the roadway.
Following distance. Rear-end impacts in reduced visibility often turn on whether the following driver left enough room (Vehicle Code § 21703).
Chain-reaction crashes: who pays?
In a pileup, several drivers may each share responsibility. California assigns fault by percentage (CACI No. 405), so an injured driver or passenger can recover from each driver whose carelessness contributed, reduced by any share of their own fault. Passengers are rarely at fault at all. Sorting out the order of impacts matters, because the damage from the first and second collisions may have to be separated.
Evidence to gather
- Photos and video of the visibility at the time, taken as soon as it is safe
- Where every vehicle ended up, and which ones had lights on
- The CHP or police report and the names of every driver involved (our crash report guide explains how to request it)
- Dashcam footage from any vehicle in the chain, which is often overwritten within days
- Weather records such as NWS warnings or advisories in effect at the time
If a public entity's road design or failure to close a known hazard played a part, a claim is usually due within six months (Gov. Code § 911.2). See claims against the State and Caltrans.
Every fact on this page links to the official source it came from. We checked each one in September 2026. Agencies change fees and procedures, so confirm with the agency before you go. How we research.
Common questions
Should I keep driving or pull over in a dust storm?
The NWS advises pulling as far off the pavement as possible, stopping, and turning off all lights, including tail lights. If you cannot pull off, slow to a speed suited to the visibility and never stop in a travel lane. [source]
The driver who hit me says the dust was an act of nature. Does that end the claim?
Not necessarily. Wind is not anyone's fault, but how a driver responded to it can be. The basic speed law requires a speed that is safe for visibility (Vehicle Code § 22350).
I was a passenger in a pileup. Who do I claim against?
Potentially every driver whose conduct contributed, including the driver of your own vehicle. Their insurers are usually separate, so identify every vehicle and insurer involved early.
Related pages
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