After Heavy Rain: Landslide & Mudslide Warning Signs for Washington Properties

When rain persists, soil becomes heavier and less stable—especially on slopes and near saturated drainage paths. Washington agencies track and document landslide activity after major rain events, and recent field work highlights ongoing attention in multiple counties.

Knowing what to watch for can help customers act early.

1) Outdoor warning signs around your property

• New cracks in soil, driveways, patios, or retaining wall areas

• Leaning fences, trees, or posts that weren’t leaning before

• Sudden pooling water where it doesn’t usually collect

• Unusual runoff patterns, especially down slopes

2) Indoor warning signs that matter

• Doors/windows sticking suddenly

• New drywall cracks near corners or ceilings

• Sloping floors or a “shifted” feel in certain rooms

• New moisture intrusion at lower walls or crawlspace entries

3) What to do immediately if you suspect movement

• Keep people out of the affected area (inside and outside)

• If safe, document changes with photos

• Avoid running water near the slope (sprinklers, hoses)

• Contact local authorities if movement is active or rapid

4) Where mitigation helps most

Even without a full slide, heavy rain can cause:

• water intrusion through foundation walls

• saturated insulation and framing

• elevated moisture that leads to secondary damage

Landall can assess moisture pathways, stabilize drying needs, and help guide next steps for repair planning moisture you can’t see.

Call to Action

If you’ve noticed new cracks, shifting, or water intrusion after storms, contact Landall to schedule an assessment. We’ll help you understand what’s happening and recommend the safest path forward.

For additional information

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