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What to do if…
a retaining wall develops a fresh horizontal crack and starts seeping water

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

Short answer

Treat the wall as a possible failure hazard until it has been assessed. Keep people and pets away from the wall, the ground above it, and the area below it; reduce water feeding the area only from a safe location.

Do not do these things

  • Do not stand beside the wall, below it, or on the ground directly above it to inspect it closely.
  • Do not patch, seal, or pressure-wash the crack as a first move.
  • Do not dig behind the wall or remove soil to investigate.
  • Do not park vehicles, place a dumpster, or stack heavy materials above the wall.
  • Do not redirect hoses, sprinklers, downspouts, or pumped water toward the wall.
  • Do not assume the seepage is harmless because the wall is outdoors.

What to do now

  1. Keep people away from the area.

    • Block access to the wall face, the ground above it, and the area below it.
    • Increase the distance if the wall is leaning, bowing, bulging, actively cracking, or releasing muddy water.

  2. Look only from a safe distance for signs that the situation may be getting worse.

    • Check whether the crack is widening or spreading.
    • Look for leaning, bowing, or bulging.
    • Look for sinking, new cracks, or shifting in the ground above the wall.
    • Notice whether seepage is increasing or carrying mud or soil.
    • Listen for cracking sounds without approaching the wall.

  3. Call 911 if anyone may be in immediate danger.

    • Call if the wall appears to be failing and could injure someone or create an immediate hazard around a home, roadway, sidewalk, or shared access.
    • For a serious concern that is not an immediate emergency, contact local authorities. Your city or county may route the report through its building, emergency-management, or public-works department.

  4. Reduce water feeding the area only from a safe location.

    • Turn off sprinklers or irrigation serving the slope.
    • Redirect a downspout only if you can do so without entering the area beside, above, or below the wall.
    • If water continues during dry weather and a plumbing leak may be involved, shut off the home’s main water supply only if you know how and it is safe to reach.

  5. Avoid pooling water above the wall.

    • Clear a surface drain only if it is safely accessible without entering the hazard area.
    • Do not build a temporary berm or barrier that could trap more water behind the wall.

  6. Document the condition from a safe distance.

    • Take wide photos or video without approaching the wall.
    • Include a fixed visible feature already in view, such as a fence post or step.
    • Note the time and any recent heavy rain, snowmelt, landscaping, excavation, or nearby construction.

  7. Contact qualified help.

    • Ask for an engineer with retaining-wall or geotechnical experience.
    • If nearby ground movement may be involved, ask whether a geologist or engineer with landslide experience is needed.
    • If you plan to seek insurance coverage, contact your insurer and ask what documentation or notice it needs before non-emergency work begins.

  8. Do not begin planned digging until utilities have been located.

    • Contact 811 before planned excavation, including digging on private property.
    • Follow the state 811 center’s instructions and confirm that utility responses are complete before breaking ground.
    • Do not delay an immediate life-safety response to make a routine locate request; follow responder instructions.

What can wait

  • Choosing a permanent repair method.
  • Comparing contractor bids.
  • Deciding who may be responsible for the wall.
  • Resolving property-line questions.
  • Cosmetic sealing, painting, or landscaping.

Important reassurance

You do not need to diagnose the crack or choose a repair today. Creating distance, stopping avoidable water flow, and arranging an assessment are useful first steps.

Scope note

These are first steps only. Later decisions may need advice from an engineer, a geologist, a contractor, an insurer, or local officials, depending on the wall and the surrounding slope.

Important note

This is general information, not engineering, legal, medical, financial, insurance, therapeutic, or other professional advice. If someone may be in immediate danger, keep away from the area 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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