How to Protect Your Plumbing During Storms, Floods & Evacuations

Last Updated on March 4, 2026 by Anta Plumbing Master Plumber

Before evacuating, shut off your main water valve, turn off the water heater, secure it with seismic straps, clear sump pump and drains, disconnect outdoor hoses, protect exposed pipes, check backwater valves, and drain your plumbing lines. These steps prevent flooding, frozen pipes, sewage backups, and damage during storms or power outages.

How to Protect Your Plumbing in Case of Evacuation

Natural disasters place your home at risk, and plumbing systems are especially vulnerable. Storms, floods, wildfires, power outages, and freezing conditions can damage pipes, rupture water heaters, overload sewers, and cause expensive flooding. If you need to evacuate, specific steps help prevent damage and keep your home safe until you return.

Below is a simple, effective plumbing protection plan you should follow before leaving your home.

Also See – Winter Holiday Plumbing Checklist for Toronto Homes

1. Secure and Turn Off Your Water Heater

Water heaters can fall, rupture, or leak during earthquakes, floods, or strong winds.

Do this before evacuating:

• Strap the heater with approved seismic bracing

• Secure both the upper and lower thirds of the tank

• Replace rigid gas lines with flexible connectors

• Turn off the gas or power supply

• Shut the cold-water inlet valve

A falling water heater can rupture gas lines or spill gallons of water. Proper bracing reduces this risk.

2. Shut Off Your Main Water Valve

Turning off the main water supply prevents flooding from burst pipes, broken fittings, or clogged drains when no one is home.

Find your main shutoff in:

• The basement

• Utility room

• Exterior wall near meter

Two common valve types:

• Gate valve: Wheel-style handle, often stiff

• Ball valve: Lever handle that closes when perpendicular to the pipe

Turn the valve until the water supply stops. Even a small pipe break can flood your home during an evacuation.

3. Clear Drains, Gutters, and Your Sump Pump

Blocked drainage increases basement flood risk during storms, hurricanes, or heavy rainfall.

Do this before you leave:

• Clean gutters and downspouts

• Remove debris from exterior drains

• Check the sump pump basin

• Test the pump manually

• Ensure the discharge line is free of obstructions

• Install a battery backup in case of power failure

A sump pump is your first line of defense against flooding. If it fails or clogs, the basement will fill quickly.

4. Drain Your Plumbing System if There Is Freeze Risk

If freezing temperatures are likely, water inside pipes can freeze, expand, and burst.

Do this before evacuating:

• Shut off main valve

• Open all faucets to drain pipes

• Flush toilets to empty tanks

• Add RV antifreeze to floor drains, sink traps, and toilet bowls

• Insulate exposed pipes

• Disconnect outdoor hoses

• Cover exterior hose bibs

Empty pipes cannot burst, even in severe cold.

5. Protect Your Sewer Line and Backwater Valve

During major storms or rapid snowmelt, sewer systems can overload. Wastewater then flows backward into basements.

To prevent backups:

• Make sure your backwater valve is working

• Clear debris from around the cleanout

• Ensure flap and gate valves move freely

• Clean the valve pit

• Inspect for blockages

Homes in flood-prone areas should never evacuate without checking the backwater valve.

6. Turn Off Individual Fixture Shutoff Valves

Protect sinks, toilets, dishwashers, and washing machines by shutting their supply valves.

This prevents:

• Leaks from cracked hoses

• Failed washing machine supply lines

• Dishwasher valve ruptures

• Toilet tank leaks

Braided stainless steel lines reduce risk, but shutting valves offers full protection.

7. Unplug Appliances and Protect Electrical Connections

Water and electricity are a dangerous combination.

Before leaving:

• Unplug washing machines, dishwashers, and water softeners

• Turn off the boiler or tankless heater

• Shut down the well pump if applicable

• Elevate appliances in flood zones

Protect control boards from electrical surges during storms.

8. Inspect Your Property for Exterior Risks

Outdoor plumbing is at high risk during disasters.

Do this:

• Remove items around the foundation

• Ensure drainage flows away from the home

• Seal cracks near pipe entries

• Protect exterior vents

• Clear debris around basement windows

This helps prevent water intrusion.

9. Prepare for Water Quality Issues When You Return

After major disasters, municipal water systems often issue boil-water advisories.

When you return:

• Flush faucets for several minutes

• Clean aerators

• Drain and refill the water heater

• Replace refrigerator and faucet filters

• Inspect for pipe damage

Never drink or cook with the water until safe.

10. Document Your Plumbing System for Insurance

Take pictures of:

• Shutoff valves

• Water heater straps

• Sump pump

• Basement condition

• Exterior drainage

Insurance claims are easier when you have proof of pre-disaster condition.

Conclusion

Protecting your plumbing system before an evacuation reduces costly damage, prevents flooding, avoids sewage backup, and keeps your home safe. Secure your water heater, turn off the main valve, clear drains, test your sump pump, drain pipes in cold climates, and protect your sewer system. These steps help safeguard your property and reduce stress during emergencies.