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What to do if…
a new crack appears in a wall or ceiling and seems to be widening

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy USA guide

Short answer

Move away from the affected area and keep other people and pets out. Leave the building and call 911 if material is falling, a ceiling is sagging or bulging, a wall is bowing or leaning, you hear shifting noises, or the structure appears at risk of collapse.

Do not do these things

  • Do not stand, sit, or sleep beneath a cracked, sagging, or bulging ceiling.
  • Do not keep using an affected room if the crack is widening, material is falling, or the wall or ceiling is changing shape.
  • Do not cut into drywall, remove material, or pull on loose sections to investigate.
  • Do not try to jack, brace, prop up, or remove structural parts yourself.
  • Do not enter or re-enter a damaged area just to measure the crack or take a closer photo.
  • Do not use electrical switches, doorbells, appliances, or phones inside if you smell gas or suspect a gas leak.

What to do now

  1. Reach a safer pause. Move people and pets out of the affected room. If you can leave the building safely without passing beneath damaged material, do so.
  2. Call 911 for immediate danger. Call from a safe location if debris is falling, a ceiling is sagging or bulging, a wall is bowing or leaning, you hear shifting or unusual cracking noises, or you think part of the building may collapse.
  3. Treat a possible gas leak as an emergency. If you smell gas or suspect a leak, leave immediately. Do not operate switches, doorbells, appliances, or phones inside. From outside, call 911 or your gas utility’s emergency number.
  4. Respond cautiously to water leakage. If water is leaking near the crack, avoid the area. Shut off the main water supply only if the shutoff is safely accessible without entering the damaged area.
  5. Record what you can from a safe place. Take a photo or video only if you can do so without approaching the crack. Note when you first noticed it and whether there was recent heavy rain, a storm, an earthquake, a plumbing leak, or nearby construction.
  6. Arrange a prompt on-site assessment.
    • If you rent: notify your landlord or property manager immediately in writing and ask for an urgent inspection. If you believe the building may be unsafe and you cannot get a timely response, check your city or county building department or code-enforcement route.
    • If you own: contact a qualified building professional, such as a licensed structural engineer where appropriate, for a prompt assessment.
  7. Use the local non-emergency reporting route where appropriate. City and county systems vary. Some cities use 311 for building-safety reports; otherwise, check your local building department or code-enforcement contact route.

What can wait

  • You do not need to decide whether the cause is drywall movement, moisture, framing movement, or a foundation issue right now.
  • You do not need to choose a repair company or sign a repair contract today.
  • You do not need to settle responsibility, insurance questions, or long-term repair plans before the area has been assessed.

Important reassurance

Cracks can have different causes, and a widening crack deserves prompt attention without assuming the worst. Keeping away from the affected area and arranging an assessment reduces avoidable exposure and gives the next professional clearer information.

Scope note

These are first steps only. Later decisions may need help from a qualified building professional, your landlord or property manager, your insurer, or your local building authority.

Important note

This is general information, not legal, engineering, insurance, financial, medical, therapeutic, or other professional advice. If you think there is immediate danger, move to a safe location and call 911.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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