Driving into a haboob: dust storm safety and the auto claim that follows

A haboob is the wall of dust pushed ahead of a collapsing thunderstorm. It forms over dry farmland and open desert, stands hundreds of feet high, moves faster than traffic and arrives with almost no warning beyond a brown horizon. On Interstate 10 between Phoenix and Tucson, along Interstate 8 west of Casa Grande, on the highways south of Las Vegas and across the Imperial and Yuma farm country, drivers go from clear afternoon to zero visibility in the time it takes to say so. The monsoon months produce the largest ones, but a dry cold front in spring can do the same.

The insurance question is unusual because the loss is often a chain: a car stops in the dust, the car behind hits it, and the crash grows until the storm passes. Fault in a chain-reaction collision in zero visibility is assigned car by car, and the coverages on each policy respond in different ways depending on where in the chain a driver sits. This guide covers how to drive a haboob, what the storm does to cars and houses, which coverage pays for each kind of damage, and how to handle the claim afterwards.

What a dust storm does

The losses are not only on the highway.

• Multi-vehicle pile-ups: the first car brakes or stops in the lane, the second cannot see it, and the collision grows for as long as the dust holds.
• Single-vehicle crashes: a driver who leaves the road at speed to escape traffic, or who stops too close to the lane and is struck.
• Sandblasting: paint, glass and headlight lenses pitted by wind-driven grit, most severely on cars driven into the storm.
• Engine and cabin filters clogged with fine dust, and dust in every seal and vent of a car or RV left in the open.
• Houses: dust forced through weatherstripping, into ducts and air conditioners, and onto everything inside; roof and fence damage from the wind that carries it; the rain and hail that often follow the dust front.
• Pools and outdoor equipment: filters, pumps and pool surfaces fouled with silt.
• Businesses: outdoor stock and signage damaged, crews stopped, deliveries stranded, and a shop full of dust to clean before it reopens.

How to drive it

The state transportation departments summarise the guidance as pull aside, stay alive, and the sequence is specific. When a dust wall is ahead or the dust starts to thicken, do not try to outrun it. Check the traffic around you, slow down, and pull completely off the paved surface as far right as the shoulder allows. Stop. Turn off every light on the vehicle, including the headlights and the hazard flashers, take your foot off the brake so the brake lights go dark, and set the parking brake. Keep the seatbelt on and wait for the storm to pass, which is usually a matter of minutes.

The lights-off rule is the one people resist, and it is the one that matters. A driver arriving in the dust follows the only thing they can see, which is the tail lights ahead, and steers toward them assuming they are in a travel lane. A car stopped on the shoulder with its lights on draws following traffic into the shoulder and into itself. If there is no shoulder wide enough to leave the road, the second-best option is to keep moving slowly with the lights on, the horn ready and a large following distance, and to take the first exit or safe stopping place. Never stop in a travel lane.

Which coverage pays

Damage to your own car in a dust-storm collision is a collision claim, whether you hit the car ahead or were hit from behind, paid less the collision deductible. The carrier then pursues the driver who hit you, if one can be identified as at fault, and your deductible is refunded if that recovery succeeds. Damage to the other cars and injuries to their occupants are your liability claim if you were the one who struck them. In a pile-up, each collision is assessed separately: the driver who struck the car ahead is usually at fault for that impact, even in zero visibility, on the reasoning that a driver who cannot see should not be moving. A driver stopped in a travel lane may carry part of the fault for being there.

Sandblasted paint and pitted glass are comprehensive claims, as damage from windstorm and flying objects, less the comprehensive deductible, and a separate glass deductible where the policy carries one. Dust in the engine and cabin filters, seals and vents is not a claim; it is maintenance. A car with liability-only coverage has no coverage for any damage to itself in a dust storm, whether from a collision or from the wind.

Injuries follow the state's rules. Arizona and Nevada are at-fault states, so the at-fault driver's bodily injury liability pays, and the uninsured and underinsured motorist coverages on your own policy pay when that driver has too little or nothing. In a pile-up involving a dozen cars, several liability limits are tested at once and some of them will be small; uninsured and underinsured motorist coverage is what fills that gap for your own household. Medical payments coverage pays your occupants' bills up to a small limit regardless of who was at fault.

The house and the business

The home policy covers windstorm damage: the fence that went over, the shingles lifted, the patio cover that flew, the window broken by debris. Dust itself is the awkward case. Cleaning dust from the inside of a house is generally not a covered loss unless the dust entered through storm damage, such as a broken window or a roof opening, in which case the cleanup is part of that covered loss. Air conditioner and pool equipment failure from dust is mechanical breakdown, excluded unless an equipment breakdown endorsement is on the policy. Rain and hail that follow the dust front are covered perils, and a wind and hail deductible, if the policy carries one, applies.

For a business, the commercial property or business owner's policy responds to wind damage and, if endorsed, to spoilage and equipment breakdown. Business income coverage pays for the closure only when there is covered physical damage to the premises; a day lost to dust cleanup with no damage is uninsured. A commercial auto policy handles a company vehicle caught in a pile-up in the same way as a personal policy, with the employer's liability limits at stake.

Before the season, and after a storm

Preparation is mostly a matter of reading the declarations page and one habit behind the wheel.

• Confirm collision and comprehensive are on every car that drives the interstate corridors in monsoon season, and know the deductibles; a liability-only car on Interstate 10 in August is a decision to self-insure a pile-up.
• Check the uninsured and underinsured motorist limits against the household's medical exposure; a pile-up is the case where they pay.
• Sign up for the state transportation department's dust storm alerts and treat a brown horizon as a reason to exit early.
• Replace cabin and engine filters after a season and keep the receipts; they are maintenance, but they show the car was looked after.
• At the house, seal weatherstripping and vents, service the air conditioner, and ask about equipment breakdown coverage.
• After a crash: stay in the car with the belt on until the dust clears and the traffic has stopped, then move to safety, call for help with a mile marker, photograph the positions of the vehicles before anyone moves them, and exchange information with every driver you struck or were struck by.
• Report to your carrier the same day and describe the sequence: what you saw, when you stopped, whether your lights were on. Those facts decide the fault split in a chain-reaction claim.
• For sandblasting: photograph the paint and glass in good light and get a body shop estimate; carriers sometimes question whether pitting is storm damage or age, and a dated photograph from before the season settles it.

A worked example

Suppose a Casa Grande driver is on Interstate 10 when a haboob crosses the highway. She slows and is struck from behind by a pickup that could not see her; her car is pushed into the van ahead. Her car takes $9,000 of damage and is not drivable; the van's rear takes $3,000. She carries collision with a $1,000 deductible, comprehensive with a $250 deductible, bodily injury liability of $100,000 per person, and uninsured and underinsured motorist coverage at the same limits.

For example, her collision coverage pays $8,000 for her car and her carrier pursues the pickup driver's liability carrier for the whole $9,000, refunding her deductible when it recovers. The van's damage is assessed against her liability coverage as the striking vehicle, but because she was pushed into the van by the pickup, her carrier argues the pickup driver's liability should pay it, and the adjusters settle that between them. Her neck injury runs to $15,000 of treatment; the pickup driver carries only a small liability limit, so her own underinsured motorist coverage pays the rest. Her paint, sandblasted on the passenger side, is repaired under comprehensive less the $250 deductible. Every figure is illustrative, and the fault split in a real pile-up takes weeks; what made the outcome manageable was carrying collision and underinsured motorist coverage on a corridor car.

The decision points

There are three. Whether every car that regularly drives the desert interstates in monsoon season carries collision and comprehensive, which is the difference between an inconvenience and paying for a car you cannot drive. Whether the uninsured and underinsured motorist limits match what a multi-car crash could cost your household in injuries. And whether the home policy carries equipment breakdown for the air conditioner that will be full of dust by September. If the policy already carries all three, the recommendation is to save the alert number in your phone and change nothing. We check the declarations page against the roads you drive, at no cost, and quote any change across the carriers we represent in Arizona and Nevada.