Floods are the most common and costly natural disaster in the United States, and they are getting more frequent. According to FEMA, just one inch of floodwater can cause more than $25,000 in damage to a home, and roughly 99% of U.S. counties have experienced a flooding event in the past three decades. Whether you live on a coast, near a river, or in a neighborhood that has never flooded in living memory, the question is no longer if a flood could reach you, but when. 

A strong emergency plan is the difference between chaos and a controlled response. Below is a practical guide on how to prepare for floods, built around the four stages of readiness: assess, plan, equip, and rehearse. 

Step 1: Assess Your Flood Risk 

Before you can prepare, you need to know what you are preparing for. Flood risk is not uniform, and the last decade has shown that FEMA flood maps often understate the true threat, particularly in areas affected by changing rainfall patterns, aging stormwater systems, and new development. 

Understand Your Flood Zone 

Start by looking up your property on the FEMA Flood Map Service Center. Properties in Special Flood Hazard Areas (SFHAs), labeled as Zone A or Zone V, have at least a 1% annual chance of flooding. But a property in Zone X is not flood-free; it simply carries a lower designated risk. In recent years, more than 20% of NFIP flood insurance claims have come from properties outside high-risk zones. 

Identify Local Flood Sources 

Map every potential source of water that could affect your property: 

• Rivers, creeks, and drainage channels within a mile 

• Storm surge exposure if you are within 30 miles of a coast 

• Stormwater retention ponds or low-lying streets that pool during heavy rain 

• Aging municipal infrastructure, such as undersized culverts or levees 

For commercial properties, also consider utility vulnerabilities, ground-floor entry points, and any critical equipment located below grade. 

Step 2: Build a Written Flood Emergency Plan 

A flood plan that lives only in your head is not a plan. It needs to be written, shared, and accessible even when the power is out. Every household or business flood plan should answer five questions: 

• Who needs to be contacted, and in what order? 

• Where will we go, and how will we get there? 

• What do we take with us? 

• What gets secured or deployed before we leave? 

• How will we know it is safe to return? 

Communication Plan 

Designate one out-of-area contact that every family member or team member can check in with. During regional flood events, local phone networks often fail before long-distance connections. Make sure every person has that number memorized or written down, not just saved in a phone that may die. 

Evacuation Routes 

Identify at least two evacuation routes from your home or facility. Primary routes can become impassable quickly during flash flooding, so a backup is essential. Never drive through standing water. Just 12 inches of moving water can sweep a vehicle off the road, and 24 inches can carry away most SUVs and trucks. 

Shelter and Meeting Points 

Choose two meeting points: one near your property for fast-moving emergencies, and one outside the immediate area if evacuation is required. For businesses, this should align with your broader continuity-of-operations plan. 

Step 3: Assemble a Flood Emergency Kit 

A proper flood kit supports every person in your household or facility for a minimum of 72 hours without outside help. Store it in waterproof containers on the highest accessible floor. 

Essentials for Every Kit 

• One gallon of water per person per day (minimum three days) 

• Non-perishable food for at least three days 

• Battery-powered or hand-crank NOAA weather radio 

• Flashlights and extra batteries 

• First aid kit and a seven-day supply of prescription medications 

• Whistle, dust masks, and a multi-tool 

• Cell phone chargers and a backup battery pack 

• Cash in small bills (ATMs and card readers fail during outages) 

Documents to Protect 

Scan and store digital copies of the documents below in a secure cloud account. Keep physical copies in a waterproof, fireproof container: 

• Photo ID, passports, and birth certificates 

• Insurance policies, including flood insurance 

• Property deeds, titles, and mortgage documents 

• Medical records and a list of medications 

• Recent photos or video of every room (for insurance claims) 

Step 4: Protect the Building Itself 

Personal safety comes first, but the longer-term cost of a flood is almost always property damage. Structural flood protection is where a meaningful portion of your recovery outcome is decided, and it is the stage most homeowners and business owners skip. 

Permanent Flood Barriers 

For properties with recurring exposure, permanent flood protection systems are the gold standard. Swing-hinged flood gates, passive automatic flood barriers, and permanent flood doors can provide engineered protection against hydrostatic pressure, wave action, and debris impact. These systems are designed to ANSI/FM 2510 and ASCE/SEI 24-14 standards and can be installed at specific entry points without changing the appearance of the building. 

Deployable Barriers 

For opening like doors, windows, elevators, floor drains, equipment rooms, and more, deployable systems like the FRA Flood Panel provide fast, tool-free setup.  

Lower-Cost Preparation Steps 

In addition to flood barriers, several lower-cost steps make a meaningful difference: 

• Elevate HVAC units, water heaters, and electrical panels above your base flood elevation 

• Install check valves on sewer lines to prevent backflow 

• Regrade landscaping so water flows away from the foundation 

• Seal foundation cracks and apply waterproof coatings to basement walls 

• Clear gutters, downspouts, and storm drains before every storm season 

Step 5: Rehearse the Plan 

Most emergency plans fail not because they are badly written, but because no one has ever actually executed them. A plan that has been practiced even once performs dramatically better under stress. 

Run a tabletop exercise at least once a year. For households, that can be as simple as walking through the plan over dinner. For businesses, a structured mock deployment with staff is the single most valuable preparedness investment you can make. Time how long it takes to deploy barriers, relocate critical equipment, and get people to a safe location. You will almost always find gaps that a written plan alone cannot reveal. 

Flood Preparation Is a Continuous Process 

Flooding is not a one-time threat to be checked off a list. Weather patterns shift, properties change hands, staff turns over, and equipment ages. A flood plan written five years ago may no longer match your actual risk profile. Review it every year, update it after any major property or personnel change, and test it before flood season, not during. 

Flood Risk America helps homeowners, businesses, and municipalities move from awareness to engineered readiness. If you are ready to build a flood plan that actually holds up when the water rises, our team can help you assess your risk, specify the right protection system, and train your people to deploy it under pressure.