The short answer
How Lightning Triggers a Power Surge
A direct lightning strike to a power line injects an enormous amount of electricity almost instantly. This energy travels along the lines and can enter your home's wiring. Even a nearby strike, hitting the ground or a tree, can induce a surge through electromagnetic pulses. These events are less common but carry enough power to overwhelm and destroy connected devices in a flash. The immense voltage can travel through any conductive path, including phone, cable, or satellite lines.
Surges from Power Restoration
The most frequent storm-related surges happen when the power comes back on. After an outage, the electrical grid experiences instability as equipment re-energizes. This process can create a brief spike in voltage as the system stabilizes. When electricity rushes back to your home, it can carry this excess voltage, potentially damaging anything plugged into an outlet at that moment. These restoration surges can occur multiple times as the grid attempts to reset itself during widespread storm damage.
What Damage Can a Power Surge Cause
Power surges can fry the delicate circuits in computers, televisions, and gaming systems. They can also damage major appliances like refrigerators, washing machines, and HVAC systems, leading to costly repairs or replacements. In severe cases, a surge can overload wiring in your walls, creating a fire hazard. The damage might not be immediately obvious, with devices failing days or weeks later. Subtle damage can cause appliances to run less efficiently or to trip circuit breakers intermittently.
- Destroyed electronics like computers and televisions.
- Damaged motors in refrigerators and HVAC units.
- Overloaded circuit boards in appliances.
- Potential fire risk from overheated wiring.
- Corrupted data on hard drives and systems.
- Malfunctioning smart home devices and routers.
Protecting Your Home During a Storm
Unplug sensitive electronics and appliances before a severe storm hits. This is the most effective way to prevent surge damage. For whole-home protection, consider having a qualified electrician install a service panel surge protector. Use point-of-use surge protector strips for valuable electronics, but know they have limits and can wear out after absorbing a major surge. Check the indicator lights on your surge strips regularly to ensure they are still providing protection, as their components degrade over time.
If Water and Surge Damage Occur Together
If a storm causes both flooding and a power surge, safety requires careful handling. If water enters your home, turn off the main electrical power at the breaker panel before entering affected areas. Do not attempt to use or unplug appliances standing in water. Water damage can lead to hidden moisture in walls and floors. Proper drying is needed to prevent mold. In such cases, you may need both an electrician and water damage restoration professionals to make your home safe and dry again.
Water damage does not wait
Phones are answered 24/7 for Katy and nearby communities.
Call Now (832) 979-5241Frequently asked questions
Should I unplug everything during every storm?
For severe thunderstorms, unplugging valuable electronics is wise. For light rain, it may not be necessary. Whole-home and plug-in surge protectors offer a good defense. Unplugging provides the surest protection against a direct lightning strike. Consider a plan to unplug priority devices when severe weather is forecast.
Can a power surge cause a fire?
Yes, a significant power surge can overheat electrical wires inside your walls, potentially igniting surrounding materials. It can also cause appliances to overheat and smoke. If you suspect an electrical fire, leave the home immediately and call the fire department. Have an electrician inspect your wiring after a major surge event.
What should I do if my electronics get wet and then surge?
Do not touch or plug in any wet electronic device. Water and electricity create a severe shock hazard. You may need an electrician to assess the wiring. You may also need water damage restoration professionals to dry the structure properly after the water is removed. The pros have the equipment to dry building materials completely to prevent mold.