Storm guide · Fort Walton Beach, Destin and southern Okaloosa County, Florida

Hurricane Isaias flooding in Fort Walton Beach and Destin: what to check now

By the Honest Mold Test Editorial Team · Researched from authoritative sources (incl. EPA, NWS and FEMA guidance) · Published October 2026

Hurricane Isaias came ashore near Destin on the night of Friday, October 9. Before and during landfall, the National Weather Service put southern Okaloosa County under a Flash Flood Emergency, covering Fort Walton Beach, Wright, Niceville and Destin, with 4 to 7 inches of rain already down and more falling at 2 to 4 inches an hour. Fort Walton Beach took the worst of it: spotters reported numerous instances of significant flash flooding, with depths of 2 to 3 feet in places, and water got into homes and businesses. In Destin, surge tore away part of the boardwalk. Inland, DeFuniak Springs in Walton County measured more than 12 inches of rain, and river flood warnings remain up in Okaloosa, Santa Rosa and Walton counties.

If water got into your house, garage or business, this page is for you. You may not need to spend anything on mold. The next two days of drying matter more than anything you buy. Here is how to tell what you are dealing with.

The first 48 hours: what matters

EPA guidance is that wet building materials dried within 24 to 48 hours usually do not grow mold. Florida's humidity makes that window tighter, and many homes are still without power. So the job right now is getting water out and air moving, not testing.

1. Stay safe first. Don't walk through water where power may be live, and don't run a generator indoors or in the garage.
2. Photograph before you clean. Water lines on walls, soaked flooring, damaged belongings, and the street outside. Insurers rely on these.
3. Get standing water out and open the house when the weather allows. Fans and a dehumidifier do more than heat. With the power out, opening windows on dry, breezy days still helps.
4. Pull what soaked through. Carpet pad, wet cardboard, upholstered items and the bottom of drywall that stays soft after two days usually come out. A common rule is to cut drywall a foot or so above the water line.
5. Treat floodwater as dirty. Rain flooding carries debris and runoff. Wear gloves and boots, and plan on throwing out porous items that sat in it.
6. Check what sits low. Water heaters, AC air handlers in garages, washers and dryers, and outlets near the floor should be checked before use if water reached them.

Do you need a mold test?

Often, no. If you can see mold, EPA says sampling is usually unnecessary: the job is to remove the wet material and fix the moisture. A test earns its cost when you smell mustiness but cannot find the source, when you are buying or selling, or when a landlord or insurer disputes what happened. Our cost guide lays out honest price ranges.

For a small area (EPA uses roughly 10 square feet as the line), most homeowners can handle cleanup themselves with gloves, an N95 and bagging the material. Larger areas, or water that got inside walls, are where a professional makes sense. An inexpensive moisture meter will tell you more than a mold test in the first few weeks.

Insurance: what usually applies

• Standard homeowners and renters policies exclude flood, meaning rising water from rain or surge. Flood coverage comes from a separate flood policy (NFIP or private). If you have one, report the damage now.
• Wind damage, such as a roof opening up and letting rain in, is usually a homeowners claim. Florida policies carry a separate hurricane deductible, often a percentage of the dwelling coverage, so check yours before you assume.
• Keep receipts for fans, dehumidifiers, tarps and other steps you take to prevent further damage. Most policies expect you to take reasonable steps and will look for them.
• Be careful with anyone who asks you to sign over your insurance benefits. Read anything you sign, and call your insurer directly if unsure.

What the federal declaration means (and doesn't)

As of October 10, the federal government has approved an emergency declaration for Okaloosa and 26 other Florida counties. That declaration funds emergency protective measures through state and local governments. It is not the same as a major disaster declaration, and it does not by itself open FEMA assistance to individual households. If a major disaster declaration with Individual Assistance follows, you would register at DisasterAssistance.gov or by calling FEMA, and the photos and receipts you are keeping now will help. We will update this page if that changes. We are not affiliated with FEMA or any government agency.

Is it urgent, or can you slow down? An honest triage

Renters: a Florida note

Florida law (Florida Statutes section 83.51) requires landlords to keep rentals in compliance with applicable building, housing and health codes and to keep structural components in good repair. Report water damage to your landlord in writing, keep a copy, and photograph your own belongings for a renters claim. See our renters guide.

A note on storm-chasing contractors

After a hurricane, door-knockers follow. Be wary of anyone who wants a large deposit up front, pressures you to decide today, or will not give a written estimate. Get more than one quote, and check a contractor's license with the Florida Department of Business and Professional Regulation at myfloridalicense.com.

Frequently asked

The water only came into the garage. Do I need to do anything?
Probably not much. Bare concrete dries on its own. Check the bottom of any drywall, stored boxes, and the water heater or air handler if they sit on the floor.

The power is still out. Will mold grow before I can dry things?
It can start within a couple of days in Florida humidity, which is why getting soaked material out of the house matters more than anything else. Pulling wet carpet pad and the bottom of soaked drywall slows it down even without fans.

Will bleach fix it?
Not on drywall or wood. Porous material with mold growth should be removed. Bleach is for hard, non-porous surfaces, and never mixed with ammonia.