TL;DR
After a windstorm, check the building before you clean it. Wind drives fine grit through gaps that normally do nothing, so the dust arrives everywhere at once and settles on every horizontal surface. Do a safety and opening check first, work top to bottom second, and route any structural or water damage to the appropriate trade rather than treating it as a cleaning job.
Safety before cleaning
None of this is worth an injury, and a few of these are genuinely dangerous.
Never approach a downed or sagging power line, and never touch anything in contact with one, including a fence, a tree limb, or a puddle. Stay well back and call the utility and emergency services.
Do not enter a structurally questionable space. Sagging ceilings, buckled walls, and a roof that has lost material are situations for a professional assessment, not a broom.
Assume broken glass is present if any window or door was compromised. Wear closed shoes and gloves, and handle fragments the way you would handle a knife. The safe method is described in handling broken glass and sharp debris.
Smell for gas. If there is any gas odor, leave immediately and call from outside.
Check carbon monoxide alarms, particularly if the power was out and any alternative heating was used. Never run a generator or any fuel-burning engine indoors or in an attached garage.
Photograph everything before you clean, if there is any chance of an insurance claim. Cleaning first destroys the evidence of what happened.
How do you clean a house after a windstorm?
Find and close the openings first, then work from the top down: ceilings and fixtures, then walls and shelves, then furniture, then floors last. Use a vacuum rather than a broom on fine grit indoors, since sweeping puts it back into the air where it settles again.
Finding where it got in
Wind does not need a broken window. It needs a gap, and every house has some.
Check the obvious first: any window or door left open, a screen torn out, a pet door blown loose.
Then check the gaps that only matter in wind: gaps under exterior doors, unsealed window frames, attic and crawlspace vents, a loose soffit, and a chimney or flue damper left open.
Look up. If grit is on the tops of high shelves and door frames, it came in high -- often through an attic access, a roof vent, or damaged roofing.
Look for a directional pattern. Grit concentrated on one side of the house tells you which wall to inspect from outside.
Close what you can close and note what needs a trade. A gap that let a storm in will let the next one in too.
The fine-grit problem
This is what makes windstorm cleanup different from ordinary dust.
Wind-driven grit is fine, abrasive, and evenly distributed. It does not accumulate in the usual corners -- it coats everything, including vertical surfaces and the undersides of things.
Do not sweep it indoors. A broom lifts fine particles into the air, and they settle again over the next several hours across everything you have already cleaned.
Vacuum instead, with a machine that filters well, and empty it outdoors.
Work top to bottom in a room, and room by room away from the entry. The reasoning is in dusting order that keeps dust from resettling.
Use a damp cloth on hard surfaces after vacuuming. Grit is abrasive, and dragging a dry cloth across a finished surface can scratch it -- lift the bulk with the vacuum first.
Expect two passes. Fine particles suspended during the first pass will settle overnight, and a second pass a day later finishes the job.
Windows, tracks, and screens
The window assemblies take the worst of a windstorm and hold the most.
Vacuum tracks before wetting them. Wet grit in a track turns into a paste that packs into the corners.
Clean the tracks properly rather than wiping the visible part, since they collect the grit that later scratches the door as it slides. See how to clean a sliding glass door and track.
Check and clear weep holes, which drain water out of the frame and clog easily with storm debris.
Rinse or brush screens, which trap a remarkable amount and then release it into the house every time the wind picks up again.
Inspect the sills for water that got in during the storm and dry them thoroughly, per how often to clean window tracks and sills.
Filters and the air side
The heating and cooling system pulled storm dust through itself for as long as the wind blew.
Change the HVAC filter after a significant dust event, regardless of where it was in its normal cycle, as covered in how often to change a furnace filter.
Clean the return grilles, which will show a visible mat.
Check and clean any air purifier filters.
Clean the vacuum filter too, since it just processed a large load of fine particles.
Ventilate once the outdoor air has settled, but not while it is still blowing -- opening windows into a dust event simply reloads the house.
Water is a different trade
Wind and water often arrive together, and this is where a cleaning article has to hand off.
Water that came through a roof, a wall, or a window opening is a water intrusion event, not a spill. Wet drywall, insulation, and subfloor hold moisture long after the surface feels dry.
Dry it fast if it is minor and confined. Common remediation guidance treats roughly 24 to 48 hours as the window before microbial growth begins on wet materials.
Source: EPA guidance on moisture and mold prevention in buildings
Anything soaked into building materials, anything in a wall or ceiling cavity, and anything covering a large area is a restoration job. A water damage restoration contractor has the meters and drying equipment that determine whether a wall is actually dry, which a homeowner cannot judge by touch.
Cleaning does not resolve water damage. It cleans up around it.
Mold that appears afterward on building materials is a remediation question, and roof, siding, and window repairs are for those trades.
Outdoor debris and what comes next
The outside work has its own order.
Clear debris away from doorways first so it stops being tracked back inside.
Clear gutters and downspouts, which fill with leaves and small branches in every windstorm and cause the next problem when it rains.
Check the roof from the ground with binoculars rather than climbing it. Missing shingles are for a roofer.
Deal with large limbs with the right equipment or the right help. Chainsaw injuries spike after storms.
Rinse walkways and the entry once the debris is cleared, so grit stops migrating indoors.
FAQ
How do you clean fine dust after a windstorm?
Vacuum rather than sweep, working from high surfaces downward, then follow with a damp cloth on hard surfaces. Sweeping launches fine grit back into the air, where it settles over everything again. Expect a second pass a day later as suspended particles come down.
What should you check first after a windstorm?
Safety, then openings. Stay clear of downed power lines, avoid structurally questionable areas, watch for broken glass, and check for gas odor. Then find where wind got in -- gaps under doors, torn screens, attic vents -- and photograph any damage before cleaning.
Why is there dust everywhere after high winds?
Because wind forces fine particles through gaps that do nothing in ordinary weather -- door thresholds, unsealed frames, attic and soffit vents. The particles are small enough to stay airborne indoors for hours, so they settle evenly on every surface rather than collecting in corners.
Can you clean up water damage from a storm yourself?
Only if it is small, confined, and dried within a day or two. Water that has soaked into drywall, insulation, or subfloor needs a restoration contractor with moisture meters and drying equipment, because materials that feel dry on the surface often are not underneath.
Should you change the furnace filter after a dust storm?
Yes. The system pulled storm dust through itself for the duration of the event, and a loaded filter restricts airflow and stops filtering well. Change it regardless of where it was in its normal interval, and clean the return grilles at the same time.
How long does it take for the dust to settle after a windstorm?
Indoor airborne dust generally settles over several hours to a day. That is why a single cleaning pass rarely finishes the job, and why a follow-up pass the next day catches what was still suspended while you were working through the first one.
Storms leave a house with grit in places nothing normally reaches, and it takes more than one pass. If you would rather hand off the deep pass while you handle the repairs, get a quote or read more about house cleaning services.
