A lightning strike on a house can cause a loud boom, power surges, electrical damage, roof or attic fires, and structural cracking or shattered windows. Even if the house looks fine right away, hidden damage inside walls, wiring, or plumbing can still be dangerous.

What can happen

  • Fire. Lightning can create extreme heat that ignites shingles, insulation, attic wood, or other flammable materials.
  • Electrical damage. The strike can send a surge through wiring, frying plugged-in electronics and damaging appliances.
  • Structural damage. The shock wave can crack brick, stone, walls, windows, gutters, or roofing components.
  • Hidden damage. Fires can start inside walls or the attic, so damage may not be obvious at first.

What it usually feels like

People often hear a sharp explosion-like sound, see a flash, and feel the house shake or windows rattle. In many cases, the electrical charge follows metal wiring, plumbing, gutters, or other conductive paths as it moves toward the ground.

What to do next

  1. Get everyone to safety if there is any sign of fire, smoke, burning smell, or structural damage.
  2. Call emergency services if you suspect a fire.
  3. Avoid touching damaged outlets, wires, metal fixtures, or plumbing until the home is checked.
  4. Inspect for hidden damage with a qualified professional before using affected systems again.

Bottom line

A house can survive a lightning strike, but the real risk is fire, surge damage, and hidden electrical or structural problems that show up later. If you want, I can also give you a simple “what to do in the first 10 minutes” checklist.