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Some Christmas lights are marked as being “UL Safety Certified” or Underwriters Laboratories Safety Certified. This lab is a trusted source for determining the safety standards of electrical products—you should make sure your Christmas lights have this label. Brush up on other electrical safety tips before installing any lighting features. 

Yes, a faulty or broken light switch can be a serious fire hazard. Malfunctioning switches, often due to loose connections, exposed wiring, or overheating, can cause sparking or arcing. If you hear a crackling, popping, or hissing sound when you use the switch, it indicates live electricity arcing inside, which is a significant hazard that can ignite nearby flammable materials. If you suspect your light switch is faulty, turn off the power to that circuit at the breaker and contact a qualified electrician to remedy the issue.

Lightning can cause massive damage, fires, and openings for other threats like bugs or fungal diseases. Barring any large fires or explosions, it’s difficult to tell how much damage a lightning strike has done until after a thorough inspection. Contact local authorities immediately if lightning strikes a tree in your yard and it causes a fire or explosion.

Concrete homes have better fire resistance because this material is highly resistant to fire and heat. But any paint, siding, windows, roofing, or other materials on a concrete home may still be flammable. Never try to stay in a building with a large, active fire or a wildfire approaching because this can still be deadly. However, building a fireproof home with concrete can better protect the structure against total destruction.