HOW HURRICANES CAN CAUSE DAMAGE
A power surge is a sudden increase in electrical voltage. It may last only a fraction of a second, but that can be enough to damage sensitive electronics.
Lightning is one possible cause, but not the only one. Surges can also happen when utility power is interrupted and restored, when electrical equipment switches on and off, or when power fluctuates during a storm.
During hurricane conditions, repeated outages and restorations may create unstable electrical conditions throughout the home.
A water heater can be affected differently depending on its design.
Electric tank water heaters rely on a dedicated electrical circuit to power heating elements and thermostats. A surge may damage electrical connections, thermostats, elements, or related controls.
Gas tank water heaters may appear less vulnerable because gas provides the heat source, but many newer systems still rely on electricity for ignition, control boards, power venting, or safety monitoring.
Tankless water heaters can contain:
- Control boards
- Ignition systems
- Flow sensors
- Temperature sensors
- Fans
- Electronic valves
- Displays
- Safety controls
These components coordinate the entire heating process. If one fails, the unit may stop producing hot water even though the gas and water supplies remain available.
A surge can cause immediate symptoms such as:
- No hot water
- Blank display
- Error codes
- Tripped breaker
- Failed ignition
- Repeated shutdowns
Other damage may be less obvious.
A control board can be partially damaged and continue operating temporarily before failing later. A sensor may begin reporting incorrect temperatures. A fan or ignition component may work intermittently.
This is why a water heater that behaves differently after a storm should be inspected even if it still produces some hot water.
Power outages themselves can also affect operation.
An electric water heater cannot actively heat water without power. The hot water already stored inside the tank may remain warm for a period, but the temperature will gradually fall.
Most modern tankless units also stop functioning during an outage because their electronic controls require electricity.
Some gas tank water heaters may continue operating without household power if they use a standing pilot and do not depend on powered venting or electronic controls. However, system designs vary considerably, so homeowners should understand how their specific unit operates.
Generators introduce another consideration. A water heater should only be connected to generator power when the generator, transfer equipment, wiring, and load capacity are appropriate for the system.
Large electric water heaters can place significant demand on a generator. Improper connections can damage equipment or create safety hazards.
HOW SURGE PROTECTION HELPS
Surge protection is designed to limit excessive voltage before it reaches electrical equipment.
There are several ways homeowners may protect water heaters and other household systems.
Whole-home surge protection is installed at or near the electrical panel. It helps reduce surges entering through the home's electrical service.
A whole-home device can help protect multiple systems, including:
- Water heaters
- HVAC equipment
- Refrigerators
- Appliances
- Electronics
- Pumps
- Lighting controls
Point-of-use surge protection may also be used for certain equipment. These devices are installed closer to the individual appliance or system.
The correct type depends on the water heater, electrical configuration, manufacturer requirements, and local electrical code.
Homeowners should not assume that a standard plug-in power strip is appropriate for a water heater.
Electric tank systems are generally hardwired to dedicated circuits. Tankless units may use dedicated receptacles or hardwired connections depending on the design.
A licensed electrician can determine what type of surge protection is appropriate and where it should be installed.
Grounding and bonding are also important.
Surge protection works as part of the home's electrical system. Poor grounding, damaged wiring, loose connections, or an outdated panel can reduce protection and create additional electrical risks.
Before hurricane season, homeowners may want to have the electrical system evaluated if they have experienced:
- Frequent breaker trips
- Flickering lights
- Previous surge damage
- Old wiring
- Panel corrosion
- Loose electrical connections
The water heater itself should also be inspected.
A plumber can check electrical connections, controls, venting, valves, plumbing connections, and system condition. Tankless units may also need descaling or filter cleaning as part of routine maintenance.
Surge protection cannot prevent every possible failure.
A direct lightning strike, severe utility event, flooding, or major electrical fault can still damage equipment. However, proper surge protection can reduce exposure to many common voltage spikes.
Homeowners should also avoid repeatedly resetting a breaker after a storm.
A breaker that trips once may have responded to a temporary event. A breaker that continues tripping may indicate damaged wiring, a failed heating element, water intrusion, or another electrical problem.
Repeatedly resetting it without identifying the cause can increase the risk of additional damage.
Water and electricity are especially dangerous together.
If flooding or a plumbing leak reaches the water heater, wiring, electrical panel, outlets, or nearby equipment, homeowners should not approach the area unless the power has been safely disconnected.
Professional evaluation is important before restoring operation.
PREPARE BEFORE HURRICANE SEASON
Preparation should happen before severe weather is approaching.
Start by identifying what type of water heater is installed and how it receives power.
Know the location of:
- Water shutoff valve
- Electrical breaker
- Gas shutoff
- Main water valve
- Electrical panel
These controls should remain accessible. Avoid stacking boxes, tools, or storage directly around the water heater.
Homeowners should also inspect the area for visible problems before hurricane season.
Look for:
- Rust
- Moisture
- Corroded fittings
- Loose pipes
- Damaged wiring
- Leaking valves
- Unusual noises
- Error codes
An aging water heater that is already leaking or corroded may be more likely to fail during a period when plumbing services are in high demand.
Addressing repairs before a major storm can help reduce the chance of an emergency during or immediately after severe weather.
For tankless systems, routine maintenance may include descaling, cleaning inlet filters, checking condensate drainage, and inspecting venting.
For tank systems, maintenance may include flushing sediment, inspecting the anode rod, checking valves, and examining plumbing connections.
If a hurricane is expected to cause widespread outages, homeowners may choose to shut down certain equipment before power becomes unstable.
The correct shutdown procedure depends on the water heater.
For an electric water heater, the breaker may be turned off before an expected outage. However, homeowners should not turn the breaker back on until they are confident the tank is full of water.
Operating electric heating elements without water can damage them quickly.
For gas equipment, follow the manufacturer’s instructions. Do not shut off or restart gas systems unless you understand the proper procedure.
If there is flooding, a gas smell, or visible equipment damage, do not attempt to restart the system.
After the storm, inspect the water heater before returning it to normal operation.
Check for:
- Standing water
- New leaks
- Burn marks
- Electrical smells
- Tripped breakers
- Damaged venting
- Corroded controls
- Error codes
A water heater exposed to floodwater should not simply be turned back on. Electrical components, gas controls, insulation, burners, sensors, and safety systems may have been contaminated or damaged.
Professional inspection may be necessary before the unit can be considered safe.
Tankless systems should also be checked for unusual error codes or performance changes after power is restored. A surge may affect controls even when no external damage is visible.
Homeowners using generators should follow proper electrical procedures. Never connect a generator to the home through an improvised outlet or extension-cord setup.
A licensed electrician can install an appropriate transfer switch or interlock and determine which circuits can be powered safely.
Preparing the water heater is only one part of hurricane readiness, but it can help prevent an additional emergency when the household is already dealing with storm-related disruptions.
United Plumbing can inspect your water heater before or after severe weather and identify problems involving leaks, controls, tank condition, heating performance, or storm-related damage. For electrical surge protection itself, a licensed electrician can evaluate the panel and recommend appropriate protection for the home and connected equipment.
