The short answer
Safety First
Before you touch anything, make sure the water source is off and the electricity is disconnected in the flooded zones. Floodwater can hide live wires, sharp debris, and contaminants. Wear rubber boots, gloves, and a mask. If you feel unwell or suspect sewage or chemical contamination, leave the area and see a doctor if needed.
If the flood is from a burst pipe, the water may be clean, but it can still soak into drywall, wood, and insulation. If the water came from outside, it may carry bacteria, pesticides, or fuel. Treat all floodwater as potentially hazardous until you know otherwise. Keep children and pets away from the affected areas.
Remove Standing Water
Use a pump or a wet/dry vacuum to remove as much standing water as possible. Work from the far end of the warehouse toward an exit so you do not push water into already dry areas. If the water is deep, start with a submersible pump. For shallow puddles, a mop and squeegee can handle the last bit.
Do not use your regular household vacuum for wet messes. It can shock you and damage the machine. If you have a generator, run it outside, never indoors. Once the visible water is gone, the real work begins: drying the structure and contents. Moisture hides in pallets, cardboard, and wall cavities.
- Turn off power at the breaker before entering
- Wear waterproof gloves and boots
- Use a sump pump for deep water
- Use a wet vac for shallow water
- Mop and squeegee the final residue
Dry Everything Thoroughly
After removing the water, the goal is to dry the warehouse completely. Open doors and windows if the outside air is drier than inside. Use industrial fans and dehumidifiers to circulate air and pull moisture from walls, floors, and stored goods. Lift items off the floor with blocks or pallets so air can move underneath.
Natural drying can work in dry seasons, but winter floods need mechanical help. Run dehumidifiers for days, not hours. Check hidden spots like under shelving, inside boxes, and behind equipment. If materials stay damp, mold can start within a couple of days.
- Set up fans to blow across wet surfaces
- Use dehumidifiers to lower humidity
- Lift boxes and pallets off the floor
- Remove wet drywall and insulation
- Check under racks and in corners
Sort and Clean Contents
Go through every item in the warehouse. Cardboard boxes, paper goods, and particleboard furniture that got soaked are usually not worth saving. They absorb water and can grow mold. Discard them. Items made of metal, glass, or plastic can often be cleaned and disinfected. Use a solution of bleach and water for hard surfaces, but test a small area first.
For upholstered furniture, fabric, or carpets, professional cleaning may be needed. If you have office furniture with cushions, they can hold moisture deep inside. You can try steam cleaning, but if the item smells musty after drying, it is likely ruined. For electronics, do not turn them on until they are completely dry and inspected.
When to Call the Pros
A warehouse flood is a big job. If the water was deep, covered a large area, or came from outside sources, you may need help. Local water damage pros have industrial pumps, dryers, and moisture meters. They can also handle contaminated water safely. If your warehouse has a concrete slab, they can dry it out to prevent future issues.
If you have insurance, check your policy to see what is covered. Document the damage with photos and keep a list of lost items. Policies vary, and your insurer decides what is covered. Do not wait too long to act, as mold can take hold quickly. For major cleanup, call the pros. Also, consider on-site contents cleaning for salvageable items.
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Call (208) 729-2441 any time, day or night, and describe what happened.
Call Now (208) 729-2441Frequently asked questions
How long does it take to dry a warehouse after a flood?
Drying time depends on the amount of water, the materials, and the weather. With fans and dehumidifiers, a small area can dry in a few days. Large or deeply soaked warehouses may take a week or more. Check moisture levels before you stop drying.
Can I clean floodwater with bleach?
Bleach can disinfect hard surfaces, but it does not remove dirt or oil. Clean the surface with soap and water first, then apply a bleach solution. Never mix bleach with ammonia. For porous materials like wood or drywall, bleach may not penetrate deep enough.
What should I throw away after a flood?
Throw away anything that cannot be dried and cleaned thoroughly. This includes soaked cardboard, paper, mattresses, upholstered furniture, and drywall. If an item has been in contact with sewage or chemicals, discard it. When in doubt, throw it out to avoid health risks.