Mold After Flooding in Maryland: Risk Map, Recovery Steps & Recent FEMA-Declared Events

Why this page exists

When a flood happens in Maryland, mold growth typically begins within 24 to 48 hours if wet building materials are not dried fast enough. This page pulls real numbers from the FEMA OpenFEMA data set so Maryland homeowners can see the scale of the flood-loss history in their state, the most recent federally declared flood-type events, and the steps that matter most in the first 72 hours after the water recedes.

Maryland flood loss snapshot (FEMA OpenFEMA)

Maryland has seen significant flooding losses, with 25,353 paid NFIP claims in the FEMA program’s records to date.

• NFIP paid claims (all years on file): 25,353
• Source: FEMA OpenFEMA, FimaNfipClaims dataset

Most recent federally declared flood-type events in Maryland

These are the most recent FEMA disaster declarations for Maryland that involve flood-related incident types (Flood, Severe Storm, Hurricane, Tropical Storm, Coastal Storm, Tornado, Mud/Landslide, etc.).

• Tropical Storm Isaias (February 2021, Hurricane, Major Disaster Declaration)
• Severe Storm And Flooding (July 2018, Flood, Major Disaster Declaration)
• Severe Storms And Flooding (June 2018, Severe Storm, Major Disaster Declaration)
• Severe Storm And Flooding (September 2016, Flood, Major Disaster Declaration)
• Snowstorm (April 2014, Severe Storm, Major Disaster Declaration)

Source: FEMA OpenFEMA, DisasterDeclarationsSummaries. The list above is the most recent unique disaster events in the API and is not a complete history.

What you have to do in the first 24 to 48 hours after a flood

The single most important fact about post-flood mold is the timeline. The U.S. Environmental Protection Agency and CDC both put the window for active drying at 24 to 48 hours before mold growth becomes likely on porous materials.

The steps that matter most:

1. Document everything before you touch it. Photo and video the entire affected area before moving anything. Insurance and any future FEMA Individual Assistance claim will hinge on this.
2. Get the water out. Pump or wet-vac standing water as soon as it is safe (no live electrical, no contaminated floodwater contact without protection).
3. Open the structure up. Remove wet drywall to at least 12 inches above the high-water line. Pull out wet insulation. Soaked carpet and pad almost always have to go. Cabinets and trim trapping water need to come off the walls.
4. Dry aggressively for several days. High-volume air movers and dehumidifiers, not just open windows. Most large flood losses need professional drying equipment to hit the 24 to 48 hour window across an entire home.
5. Treat surviving studs and framing. Once the cavities are open and dry, the framing and subfloor surfaces should be cleaned and treated before they get closed back up. Skipping this is the most common reason post-flood mold reappears six months later behind newly hung drywall.
6. Get a qualified mold remediator involved if the affected area is more than 10 to 25 square feet. State licensing thresholds vary; see your state’s mold licensing rules at Maryland mold remediation laws for the specifics that apply where you live.

What FEMA Individual Assistance covers (and what it does not)

After a federally declared major disaster (a “DR” declaration), homeowners and renters in affected counties may be eligible for FEMA Individual Assistance. That can include grants for temporary housing, home repair, and other serious needs. NFIP claims are paid through the National Flood Insurance Program, which is separate from Individual Assistance; if you have a flood policy, file the NFIP claim first and use IA to fill remaining gaps.

For program detail and the most current list of declared counties for any active event, go to DisasterAssistance.gov and the FEMA disaster page.

How to find a qualified mold remediator in Maryland after a flood

Insurance carriers commonly require contractors with the appropriate state credentials for flood-related mold remediation to be eligible for full claim payment. Use the verification links on the Maryland mold remediation laws page to confirm any contractor is current with the state authority before you sign anything.

If you want help finding a mold pro near you, call Lookmold at 866-871-0209. We will connect you with a contractor in your area, by phone.

A note on this page

This guide is informational, not legal or insurance advice. NFIP claim counts are pulled from the FEMA OpenFEMA FimaNfipClaims dataset and represent paid claims in the program’s records to date as of the page’s last review date. Disaster declaration data is pulled from FEMA DisasterDeclarationsSummaries. Both datasets are public domain and update regularly.