Why Do Power Surges From Storms Cause House Damage?

A power surge during a storm usually comes from outside your property. Lightning can strike a utility pole, transformer, or even the ground near buried wiring. The strike sends an immense electrical pulse racing through the community grid. This pulse follows the path of least resistance, which is often the main power line feeding directly into your home's electrical panel.

The surge can also enter through other conductive paths. Telephone lines, cable TV lines, and internet cables are all connected to external systems and can carry a surge indoors. If these lines are not properly protected with surge suppressors, the voltage spike can travel straight to your modem, television, or computer, causing immediate damage to their internal components.

The electrical wiring inside your walls is also at risk during a severe surge. The sudden extreme current can overheat the wires, damaging their insulation. This degradation creates a serious long-term fire hazard, as compromised insulation can lead to short circuits and arcing long after the storm is over.

Damaged wiring behind walls is difficult to detect. You might notice flickering lights, a burning smell, or outlets that feel warm to the touch. These are warning signs that should be investigated. Addressing this promptly is crucial for safety, especially after severe weather.

• Overheated wires melt their plastic insulation coating.
• Exposed copper wires can arc, creating extreme heat.
• This arcing can ignite surrounding wood framing or insulation.
• Damage may be hidden inside walls for months or years.
• Faulty wiring is a leading cause of electrical house fires.
• A qualified electrician is needed to safely assess and repair it.

First, ensure your personal safety. If you smell burning or see smoke, leave the home and call emergency services from outside. Do not touch electrical panels or outlets if there is standing water. Once safe, unplug all sensitive electronics and appliances to prevent further damage from any residual instability in the power lines.

Next, document everything for a potential insurance claim. Take clear photos of any visibly damaged devices, scorched outlets, or signs of electrical issues. Make a list of all affected items, including model numbers if possible. Policies vary, and your insurer decides what is covered. Then, contact a qualified electrician to inspect your home's wiring before restoring full power.