Signs Your House Was Struck by Lightning, and What to Check Next

The clearest signs your house was struck by lightning are a deafening crack with a flash at the same instant, a burning or acrid smell, tripped breakers, and several electronics dying at once. The sign that matters most is one you can’t see from the living room: smoke or heat in the attic. The Lightning Protection Institute passes on a state fire marshal’s advice to check enclosed spaces like the attic and basement right away, even if no smoke alarm is sounding (LPI).

If you smell smoke or gas, get everyone out and call 911 before you do anything else. Everything below can wait until the fire department has cleared the house.

Why a strike can be hard to spot

Lightning doesn’t always blow a hole in the roof. The National Weather Service says it can enter a home three ways: by striking the building directly, through wires or pipes that run outside the structure, or through the ground. Once inside, it can travel through the electrical, phone, plumbing and cable or antenna systems, and through metal in concrete walls and floors (NWS). That means the damage can show up rooms away from where the strike hit, or in a device plugged into a line that runs out to the street.

It’s also why a strike can start a fire that smolders unseen in the attic or inside a wall. NFPA data shows that from 2002 to 2005, only 16% of reported lightning fires were in homes, but those home fires caused nearly all of the related civilian deaths, 90% of the injuries and 58% of the direct property damage (NFPA, Ahrens). The same report found lightning fires peak in summer and in the late afternoon and early evening.

What a nearby strike sounds and looks like

A close strike is different from ordinary thunder. The NWS describes a sequence: someone very close first hears a click from the nearby upward streamer, then a loud crack from the strike itself (NWS Dr. Lightning guide). NOAA’s storm lab adds that very close thunder has a tearing sound because it still has its high frequencies, while distant thunder is a low rumble (NSSL).

If the flash and the bang came together, with no gap you could count, the strike was very close. Treat it as a possible hit and go through the checks below.

Outside checks

From the ground and with binoculars if you have them (stay off the roof until the storm has passed and someone qualified can go up):

• Roof: missing or blown-off shingles, scorch marks, holes, or debris in the yard. LPI lists debris falling from damaged chimneys or shingles as a warning sign.
• Chimney: cracked or missing brick, a displaced cap, mortar on the roof or the ground.
• Roof projections: antennas, satellite dishes and weather vanes that are bent, scorched or knocked off. LPI names roof projections as a common entry point.
• Trees near the house: a fresh strip of bark blown off, split trunk or scorched wood. A strike to a tree can jump to a house as a side flash.
• Siding, gutters and downspouts: scorching or melted spots, especially where they meet a wire or pipe.
• Electric meter and service line: scorch marks or damage. Call the utility if you see any.

Inside checks, starting with the attic

Where	What to look and smell for	Why
Attic	Smoke, haze, heat, burning or acrid smell, scorched framing or insulation	Strikes often attach at the roof peak or chimney; LPI and fire marshals say check here first
Basement and crawlspace	Smoke, burning smell, scorch at the main water or gas line, the panel or the ground connection	Current exits to ground through piping and electrical grounds
Electrical panel	Tripped main or several tripped breakers, scorching, a hot panel cover	Surge or direct current through the wiring
Outlets, switches, GFCIs	Scorch marks, melted covers, warm plates, GFCIs that won’t reset	Surge damage in the branch circuits
Electronics and appliances	Several devices dead at once, especially TVs, routers, garage door openers, HVAC controls	Surges come in on power, cable and phone lines
Gas lines and appliances	Gas odor, hissing near a gas line or appliance	LPI lists metallic piping, including CSST gas piping, among lightning’s paths into a home
Well pump, irrigation, invisible fence, electric gate	Controllers or pumps not working	LPI lists these as entry paths too

If you smell gas, don’t touch light switches. Leave the house and call 911 and the gas utility from outside.

Who to call, and in what order

1. 911 or the fire department for any smoke, heat, burning smell or gas odor, even if you can’t find a flame.
2. The gas utility if you smell gas or think a gas line was hit.
3. A licensed electrician for tripped mains, scorched outlets or a damaged panel. Don’t keep resetting breakers that trip again.
4. Your insurance agent or company to start a claim. Our guide to whether homeowners insurance covers lightning strikes includes a documentation checklist.
5. A roofer for visible roof or chimney damage.
6. A lightning protection contractor, if your house has a system, to inspect it, or if it doesn’t, to talk about protection while the roof and attic are open.

Document before you clean up

Lightning claims are expensive. The Insurance Information Institute reports an average US homeowners lightning claim of $26,616 in 2025, and $60,382 in Texas (III). Before you clean up, photograph everything, write down the exact time of the strike, list the damaged devices, and keep them until your adjuster has seen them. Triple-I notes that some homeowners policies cover power surges that are the direct result of a lightning strike (Triple-I), so documenting that a strike happened matters.

If your house has a lightning protection system

A system that took a strike did its job, but that doesn’t mean it’s ready for the next one. Conductors, clamps and bonds can loosen, melt or crack, and a ground connection can be damaged. Look for:

• Air terminals that are bent, scorched or missing
• Conductors pulled loose from their fasteners or burned at a connection
• Damage near ground rods or down conductors at grade

Then have it inspected. A strike is one of the standard triggers for re-inspection; see when to have your system re-inspected for the others. If your house has no protection, our post on what happens when lightning strikes a house without protection explains what you’re up against next time.

Have your house or system checked

If lightning hit your home or something close to it, contact Site Safe Lightning Protection. We can inspect an existing lightning protection system after a strike, document what we find for your insurer, and explain what a new system would involve. Learn more about our residential lightning protection services.