Quick Answer
Small businesses should prepare for flooding by checking local flood exposure, reviewing insurance coverage, protecting critical equipment and records, improving drainage, writing a business continuity plan, and training staff on safe shutdown and evacuation. A written plan reviewed at least once a year — and again after any flood event — is the single best way to reduce damage, downtime and risk to staff.
Why it matters
Businesses that prepare before disruption recover faster, protect staff better, and reduce unnecessary costs.
Detailed guide
Why small businesses need a flood plan
Flooding is not only a coastal or riverside problem. Heavy rain, blocked drains, overwhelmed sewers, burst water mains and rapid snowmelt can damage businesses far from a floodplain. For small businesses with limited cash reserves, even a few days of closure can turn a manageable clean-up into a long-term financial problem.
The good news is that most flood damage is preventable or reducible with preparation. A written plan, reviewed once a year, costs far less than replacing stock, repairing equipment, or losing customers while the premises are closed. It also protects the people who keep the business running.
This checklist is designed for owners and managers without a dedicated emergency planning team. It focuses on the practical steps that matter most: understanding your exposure, protecting your premises, keeping operations running, and looking after staff.
Before flood season
Preparation should happen before the weather turns. The steps below form the foundation of a flood plan. They can be completed over a few short sessions and updated annually.
Check local flood exposure
Start with authoritative sources. In the United States, FEMA's Flood Map Service Center, Ready.gov and the NOAA National Weather Service provide flood risk information, planning guidance and alerts by address. The European Environment Agency and national environment agencies publish similar flood risk maps for EU countries. Look at both riverine and flash-flood risk, and note whether local roads, drains or neighbouring development have changed since your last review.
Even if your premises are not in a mapped floodplain, consider how staff and suppliers reach you. A flooded road or rail line can stop operations just as effectively as water inside the building.
Review insurance coverage
Standard commercial property insurance often excludes flood damage from surface water, overflowing rivers or heavy rain. Check your policy documents carefully and ask your broker or insurer whether separate flood cover is available. Understand the waiting periods, exclusions and claim procedures before you need them.
This article does not provide insurance or legal advice. It is simply a prompt to confirm what your policy covers, what it does not, and how you would document a claim if flooding occurred.
Identify critical equipment and records
Walk through the premises and list the equipment, stock and documents that would be hardest or most expensive to replace. Common examples include servers, point-of-sale systems, manufacturing tools, paper records, signed contracts, and inventory stored on the ground floor or in basements.
Raise vulnerable items at least 12 inches above the expected flood level where possible, move them away from known water-entry points, and store digital copies of key records in the cloud. The Business Continuity resources in the WorkplaceReady readiness hub include guidance on protecting business-critical records.
Confirm drainage and water-entry points
Inspect gutters, downpipes, drains, sumps, backflow valves and external drainage around the property. Clear leaves, sediment and debris before the wet season. Check that water can flow away from the building rather than pooling against walls or doorways.
Identify every place water could enter: ground-floor doors, loading bays, air vents, cable penetrations, windows, and basement light wells. Some can be sealed quickly with temporary barriers; others need permanent improvements.
Prepare supplier and customer communications
List your key suppliers, customers and service providers with multiple contact methods. Decide who will notify them if you close, how quickly, and through which channels. A short, pre-written message template saves time during a stressful event and reassures customers that you are managing the situation.
Premises checklist
Physical preparation reduces the amount of water that enters and limits what it can damage. Use this checklist to inspect and improve the building before the wet season.
Doors, loading bays and low entry points
Install permanent or removable flood barriers on doors and loading bays that sit below the flood level. Fit door seals, raised thresholds and flood skirts where appropriate. Keep sandbags or modern flood sacks in an accessible location, along with a simple fitting guide so any staff member can use them correctly.
Drains and gutters
Clean gutters and downpipes at least twice a year, and again after heavy leaf fall. Check that drains are not blocked by silt, litter or tree roots. Make sure downpipes discharge into drains or soakaways that carry water away from the building.
Basement and ground-floor storage
Move valuable stock, archives and equipment off the ground floor or basement if those areas are at risk. Use shelving with legs rather than solid plinths, so water can flow underneath. Do not store hazardous chemicals, fuels or electrical items in areas prone to flooding.
Electrical equipment
Raise electrical sockets, fuse boards, wiring, servers and backup power equipment above the likely flood level. Label the main switches clearly so that staff can shut off power quickly and safely. Consider an electrician's assessment if the building has a history of water ingress.
Stock and hazardous materials
Store chemicals, cleaning agents, fuels, paints and oils on raised shelving, in secondary containment, and away from drains. If these materials are released by floodwater, they can create health hazards, environmental damage and additional clean-up costs.
Vehicles and movable equipment
Identify a safe relocation point for vehicles, portable tools, generators and mobile equipment. Include the relocation route in the plan, because the usual car park may be the first place to flood. Keep vehicle keys and fleet contact details in the emergency pack.
Business continuity checklist
A flood plan is not only about the building. It is also about keeping the business alive while the premises are unusable. The Business Downtime Cost Calculator can help you estimate the daily cost of closure, which makes the case for investing in preparation.
Critical functions
List the functions that must continue within the first 24 hours, 72 hours and one week after a flood. Examples include payroll, customer support, order fulfilment, supplier payments and regulatory reporting. For each function, note who is responsible, what systems it needs, and what happens if the premises are unavailable.
Remote-work options
Identify which roles can work from home, which need access to files or systems, and what equipment each person needs. Test remote access before a flood occurs. Ensure that staff can reach the tools, documents and communication channels they need without entering the building.
Manual operating procedures
Write down how key tasks can be performed without computers, power, or the usual premises. Include paper forms, cash-only sales, manual order logs, and alternative payment methods. Even a short manual procedure can keep a small business trading for a few days.
Backup communications
Keep an up-to-date staff contact list, including personal mobile numbers and emergency contacts. Choose a group messaging channel that does not rely on the premises' internet or power. A simple group chat or external phone tree is often enough for a small team.
Alternative suppliers
Identify backup suppliers for critical materials, logistics, IT support and professional services. Confirm their lead times and capacity during busy periods. A single supplier can be as vulnerable as your own premises if they are in the same flood area.
Customer notification process
Decide how customers will be told about closures, delayed deliveries, or alternative service arrangements. Prepare website banners, social media posts, email templates and voicemail messages in advance. Clear, honest communication protects reputation and reduces inbound calls when you are already stretched.
Staff preparedness
Staff safety is the highest priority. A calm, well-trained team responds faster and makes better decisions under pressure. Make sure every employee understands their role, knows the warning signs, and feels confident to act.
Named decision-maker
Name a single person who has the authority to trigger the flood plan, close the premises, and send staff home. Provide a deputy in case the primary decision-maker is unavailable. The chain of command should be clear, documented, and shared with everyone.
Emergency contacts
Keep a printed list of emergency contacts in the office, the emergency kit, and with key staff. Include local emergency services, the landlord or property manager, insurers, utilities, key suppliers, and a qualified electrician or building engineer.
Safe shutdown procedures
Write a short, ordered shutdown checklist for staff to follow before leaving. It should cover switching off non-essential power, moving vehicles and equipment, securing hazardous materials, backing up data, and locking the building. Practice the shutdown once a year so it takes minutes rather than hours.
Evacuation responsibilities
Identify who checks that all staff, visitors and vulnerable workers have left safely, who takes the emergency kit, and who confirms the headcount at the assembly point. Keep the assembly point away from the building and above likely flood levels.
Re-entry rules
Make it clear that no one re-enters the building until it has been declared safe by the appropriate authority or a qualified person. Re-entry after a flood must consider electrical hazards, structural damage, contaminated water, and unstable flooring. The Power Outage Readiness Assessment includes guidance that complements flood recovery planning for businesses facing both risks together.
When flooding is imminent
When a flood warning is issued, the goal is to move from preparation to action quickly and calmly. The following checklist is designed for a manager or owner on site. Tick through it in order, and keep the emergency contact list close.
Monitor the National Weather Service, NOAA, Met Office or your national weather authority for updates. Confirm the named decision-maker is available and briefed. Move vehicles and movable equipment to the pre-planned safe location. Move stock and critical records above the flood level or off site. Switch off non-essential power at the main panel if safe to do so. Fit flood barriers, door seals and sandbags at known water-entry points. Send non-essential staff home early if travel conditions are expected to deteriorate. Notify customers, suppliers and key partners using the pre-written message templates. Confirm the evacuation plan, assembly point and headcount process. Take a final walk-through, secure the building, and leave if instructed or if water is entering. Do not re-enter until the property is declared safe.
After the water recedes
Recovery starts with safety. Rushing back into a damaged building can injure staff, create liability problems, and make damage worse. Follow a structured recovery sequence.
Do not re-enter until safe
Wait for confirmation from emergency services, the landlord, a structural engineer or a qualified building professional before allowing anyone inside. Floodwater can weaken walls, floors and foundations, and hidden electrical hazards can remain even after water has drained away.
Photograph damage
Before anything is moved, cleaned or repaired, take clear photographs and video of every affected area, item and surface. This documentation supports insurance claims, tax records, and any future safety investigations. Include time-stamped notes where possible.
Contact insurers
Notify your insurer or broker as soon as possible. Follow their guidance on which contractors to use, what records to keep, and how to prevent further damage. Keep copies of every communication and receipt.
Check electrical and structural safety
Do not turn the power back on until a qualified electrician has inspected the installation. Have the building assessed for structural integrity, gas leaks, and water damage to fixed equipment. Do not assume that because the water is gone, the building is safe.
Protect staff from contaminated water
Floodwater can contain sewage, chemicals, fuel, bacteria and debris. Anyone involved in clean-up needs appropriate personal protective equipment, including gloves, boots, eye protection and masks. Provide hand-washing stations and ensure staff know when to seek medical advice.
Record downtime and recovery costs
Track the hours of closure, wages, lost sales, temporary premises, replacement equipment, clean-up costs, and supplier delays. This information helps with insurance claims, business loans, and future planning. The Business Downtime Cost Calculator can help you build a clear picture of the financial impact.
Flood season preparation checklist
Actionable steps employers can implement immediately.
- Check your address on an official flood risk map and note alternative access routes for staff and suppliers.
- Confirm what your insurance policy covers for flood damage and how to start a claim.
- List critical equipment, records and stock, and raise or relocate anything stored on the ground floor or in basements.
- Clean gutters, drains and downpipes; check water flows away from the building.
- Install or procure removable flood barriers, door seals and sandbags for low entry points.
- Raise electrical sockets, fuse boards and servers above the expected flood level.
- Write a one-page business continuity plan naming critical functions, remote-work options, and alternative suppliers.
- Create a staff contact list, a group messaging channel, and pre-written customer notification templates.
- Name a decision-maker and deputy with clear authority to close the premises and send staff home.
- Train staff on safe shutdown, evacuation, and the rule that no one re-enters until the building is declared safe.
- Prepare an emergency kit with contacts, key documents, first aid, torches, and basic tools.
- Review and rehearse the plan at least once a year, and again after any flood or near-miss.
Common mistakes
Assuming you are not at risk
Many floods happen outside mapped floodplains. Heavy rain, blocked drains and burst water mains can affect businesses nowhere near a river. Every premises should have a basic flood plan.
Waiting until the warning is issued
By the time a flood warning is issued, sandbags may be unavailable, staff may be stranded, and the best mitigation options have passed. Most protective steps must be taken before the wet season.
Forgetting about staff and suppliers
A building can survive water while the people who run the business cannot get to work. Plans that focus only on the premises miss the most important variable: your team.
Storing electronics and records on the ground floor
Ground-floor storage is the single most common source of avoidable flood loss. Raising equipment and digitising records is usually cheaper than replacing them.
Re-entering too quickly after a flood
Rushing back into a damaged building puts staff at risk and can cause further structural or electrical damage. Always wait for a qualified assessment before re-entry.
Frequently asked questions
- How should a small business prepare for flooding?
- Start by checking the official flood risk for your address, reviewing your insurance coverage, and listing the equipment, records and stock that would be hardest to replace. Improve drainage around the premises, raise or relocate vulnerable items, write a simple business continuity plan, and train staff on safe shutdown and evacuation. A one-page plan reviewed annually is the most practical first step.
- What equipment should be moved first?
- Move the items that are hardest to replace and most vulnerable to water. This usually includes servers, point-of-sale systems, electrical panels, manufacturing tools, signed documents, and any stock stored at ground level or in basements. Also move vehicles and portable generators to a pre-planned safe location.
- Does standard business insurance cover flood damage?
- Standard commercial property policies often exclude flood damage from surface water, heavy rain or overflowing rivers. Some insurers offer separate flood cover, but terms, waiting periods and exclusions vary. Read your policy and speak with your broker or insurer. This article does not provide insurance or legal advice.
- When should staff evacuate?
- Staff should evacuate when the named decision-maker judges that the premises are no longer safe, when local authorities issue an evacuation order, when water is entering the building, or when travel conditions are becoming dangerous. The decision-maker should follow a clear, pre-agreed plan and never ask staff to stay in an unsafe building.
- How often should a flood plan be reviewed?
- Review the plan at least once a year, ideally before the wet season. Also update it after any flood, near-miss, building change, staff change, or change in suppliers. A plan that is out of date is only slightly better than no plan at all.
Author
WorkplaceReady Editorial Team
WorkplaceReady publishes practical, OSHA-aligned guidance on workplace heat safety, risk assessment, and emergency response — written for the people responsible for keeping workers safe.