Quick answer: what should a property owner do first after a flood?

OSHA recommends controlling access until structural integrity is known, and EPA guidance emphasizes rapid drying and professional help when cleanup is dangerous or too difficult. [OSHA] [EPA]

1. Control access before you start cleanup

Receding floodwater doesn’t automatically make a building safe to enter. Water can hide damaged flooring, unstable materials, live electrical hazards, gas problems, contamination, and sharp debris. Commercial properties also need access control so employees, tenants, contractors, and curious visitors don’t move through affected areas before they’ve been checked. [OSHA]

For a commercial site, the practical move is to set up a controlled entry point and decide who is authorized to enter, for what purpose, and with what protective equipment. “Safe to enter,” “safe to perform cleanup,” and “ready for normal occupancy” are three different decisions.

2. Treat electrical, gas, and building systems as potential hazards

Don’t switch power on or off while standing in water. If flooded electrical components, wiring, outlets, panels, or equipment are involved, have a qualified electrician evaluate them before re-energizing the system. OSHA also advises treating downed lines as energized until proven otherwise. [CDC] [OSHA]

If you suspect a gas leak, leave the area and contact the utility or appropriate emergency service. Avoid lights, engines, tools, or other equipment that could create a spark until the hazard is cleared. [CDC]

HVAC also deserves caution. EPA guidance for commercial buildings says not to run an HVAC system if it is known or suspected to be contaminated with mold. A flooded or contaminated system can spread material into unaffected areas, so the system may need to be inspected and cleaned before it’s restarted. [EPA Commercial Mold Guide]

3. Document the damage before cleanup when it is safe

Good documentation serves two purposes: it helps support an insurance claim and gives the owner a clear record of what happened, what was removed, and what still needs attention. Take wide photos first, then move in closer to capture individual rooms, systems, equipment, fixtures, and damaged contents. [NFIP]

FloodSmart specifically recommends clear photos and videos before cleaning or disposal, including water levels and serial numbers, and advises keeping small samples and repair receipts where appropriate. [FloodSmart documentation guide]

4. Notify the insurer and confirm what the policy requires

Report the loss as soon as practical and ask what must be documented before damaged materials are removed, what emergency work can begin, and whether the insurer wants estimates or inspections before permanent repairs begin. If the claim is under the National Flood Insurance Program (NFIP), FloodSmart says the insurer will connect the policyholder with an adjuster and advises documenting damaged property before cleanup. [NFIP claim process]

Don’t assume the flood policy works like the property’s other insurance. Current NFIP guidance says commercial building coverage and commercial contents coverage can each be purchased up to $500,000, with separate coverage and deductibles. It also lists financial losses from business interruption among expenses not protected by an NFIP flood policy. Private flood, property, business-income, or other coverage may be different, so the actual policy controls. [NFIP coverage]

5. Start water removal and drying quickly — but match the response to the risk

Once entry and utility hazards are controlled and the loss has been documented, move quickly on moisture. EPA guidance says flooded materials should be dried as quickly as possible, with a 24–48-hour response window as a practical target for reducing mold risk. That’s a window for action, not proof that mold starts growing at a specific hour. [EPA flooded home] [EPA commercial mold guide]

The right drying method depends on what got wet, how much area is affected, whether contamination or visible mold is present, and whether building systems were involved. EPA’s commercial guidance calls for a remediation plan that addresses the moisture source, the size and type of affected materials, occupant protection, containment when needed, and professional judgment for the specific situation. [EPA commercial mold guide]

Fans aren’t always the answer. EPA warns that fans and other air movement can spread mold spores into unaffected areas when mold is present or disturbed. If the water source, contamination level, mold condition, or HVAC involvement is unclear, use a qualified remediation or indoor-environment professional to set the drying plan. [EPA commercial mold guide]

A practical recovery timeline

6. Communicate with tenants, employees, and occupants in writing

After a flood, people need the same basic information: whether they can enter, which areas are restricted, what has been shut down, where to report damage, and when the next update will come. Put that information in writing. A dated email, tenant notice, or incident log is easier to track than a chain of verbal instructions passed between owners, managers, vendors, and occupants.

For a commercial building, designate one contact for restoration and repair questions and one process for vendor access. If a business tenant has equipment, inventory, or tenant improvements in the affected area, document who is responsible for inspecting or removing each item before work begins around it.

EPA’s commercial mold guidance specifically recommends communicating with building occupants during remediation when appropriate to the situation. Clear communication also helps prevent people from re-entering areas just because cleanup has started. [EPA commercial mold guide]

7. Rental and commercial properties have different recovery questions

The early safety steps are similar, but the management questions split quickly. A residential rental may raise habitability, repair, access, and lease issues. A commercial property may add business continuity, common-area access, inventory, equipment, tenant improvements, operating hours, and reopening decisions.

8. Louisiana rental-property rules need a lease-specific legal review

For Louisiana properties, the Civil Code creates a legal framework for repairs and loss of use, but the outcome after a specific flood depends on the lease, the property, the cause and extent of damage, and the circumstances of both parties. Article 2691 generally requires the lessor (landlord) to make necessary repairs that keep the leased property suitable for its purpose, except repairs for which the lessee (tenant) is responsible. [La. Civ. Code art. 2691]

Other provisions address the landlord’s right to make necessary repairs even when they cause inconvenience or loss of use, a tenant’s limited right to make necessary repairs after demand when the landlord does not act within a reasonable time, and the consequences of total destruction or substantial impairment of use. Those rules can affect rent or lease remedies, but they shouldn’t be reduced to a universal “rent stops” or “the lease ends” rule. [Art. 2693] [Art. 2694] [Art. 2714] [Art. 2715]

9. New Orleans owners should check Healthy Homes and floodplain requirements

New Orleans adds local rules that can affect the repair and return-to-use plan. For residential rentals in Orleans Parish, the City’s Healthy Homes program lists minimum standards that include a properly maintained electrical system, exterior protection against dampness or deterioration, and no evidence of mold in the unit. [New Orleans Healthy Homes]

Flood repair work can also trigger permit and flood-protection requirements. The City’s Floodplain Management page states that all development needs a permit and defines development to include repairs to an existing building. It also states that a building substantially damaged by 50% or more, or substantially improved by 50% or more, must meet new flood-protection requirements. That 50% threshold does not mean work below it is automatically permit-free. [New Orleans Floodplain Management]

10. Use a final gate before reopening or reoccupying the property

A building can look clean long before it’s ready for normal use. Reopening should be based on the specific hazards, systems, repairs, permits, and use of the property—not on whether standing water is gone or the visible cleanup is finished.

• ☐Access hazards and structural concerns identified during the event have been addressed for the areas being reopened.
• ☐Electrical, gas, HVAC, plumbing, fire/life-safety, elevators, and other affected systems have been evaluated or restored as required for the building’s use.
• ☐Water extraction, drying, and any needed remediation have been completed under an appropriate plan, with affected areas checked for recurring moisture.
• ☐Unsafe or unsalvageable materials have been removed and work areas are separated from occupied areas where work is still ongoing.
• ☐Required repair permits, inspections, local approvals, or occupancy conditions have been addressed for the actual scope.
• ☐Tenants, employees, vendors, and occupants know which areas are open, which remain restricted, and who to contact about remaining problems.
• ☐The owner’s incident record includes the latest inspections, vendor reports, photos, receipts, claim communications, and repair status.

For mold or moisture work in a commercial building, EPA says the remediation plan should protect occupants and remediators, fix the moisture source, clean and dry affected materials, and be revised if hidden mold or new conditions are discovered. [EPA commercial mold guide]

11. Keep one post-flood record for the next repair, claim, or storm

Don’t scatter the recovery history across phones, inboxes, and vendor portals. Keep one property file that can be handed to an insurer, attorney, property manager, contractor, lender, or future buyer without anyone having to rebuild the timeline from memory.

• Original photos and video, including timestamps where available.
• A dated incident log showing access restrictions, shutoffs, notices, inspections, and major decisions.
• Insurance notices, claim numbers, adjuster communications, estimates, proofs of loss, and payment records.
• Vendor scopes, contracts, invoices, receipts, warranties, moisture reports, remediation documentation, and inspection reports.
• Permit applications, approvals, inspection results, and closeout documents.
• Tenant or occupant notices and records of access requests or restrictions.
• A short lessons-learned note covering drainage, roof, utility, emergency-contact, vendor, and document-storage changes to make before the next event.

Need help coordinating a New Orleans commercial property after storm or flood damage?

Sources

• U.S. Environmental Protection Agency — Flooded Home
• U.S. EPA — Mold Remediation in Schools and Commercial Buildings, Chapter 3
• OSHA — Assessment, Cleanup, and Repair of Structures after hurricanes/flooding
• CDC — Safety Guidelines: Reentering Your Flooded Home
• NFIP / FloodSmart — Start a Claim
• NFIP / FloodSmart — Document Flood Damage
• NFIP / FloodSmart — Buy a Flood Insurance Policy
• Louisiana Civil Code Article 2691 — Lessor’s obligation for repairs
• Louisiana Civil Code Article 2693 — Lessor’s right to make repairs
• Louisiana Civil Code Article 2694 — Lessee’s right to make repairs
• Louisiana Civil Code Article 2714 — Loss or destruction
• Louisiana Civil Code Article 2715 — Partial destruction / substantial impairment of use
• City of New Orleans — Healthy Homes
• City of New Orleans — Floodplain Management
• LaNasa Realty — Property Management
• LaNasa Realty — Commercial Property Management in New Orleans

Research and source links checked September 30, 2026.