Landslides risk in Rhode Island

Landslide Risk in Rhode Island: What Homeowners Should Know

Rhode Island is rated Level 1 (low) landslide risk by the National Risk Index, meaning the likelihood of damaging landslides is minimal compared to other U.S. states. However, low risk does not mean no risk. The state’s hilly terrain, coastal cliffs, and glacial deposits create conditions where localized ground movement can occur, especially after heavy rainfall, rapid snowmelt, or construction activity.

Geologically, Rhode Island is part of the New England Upland, characterized by rolling hills, bedrock valleys, and glacial till left by retreating ice sheets. The coastal areas, particularly along Narragansett Bay and the Atlantic shoreline, feature bluffs of sandy and clay-rich soil that can erode or slump. Inland, steep slopes in towns like Smithfield, Glocester, and Burrillville may experience shallow landslides, especially where soil has been disturbed or saturated.

Most landslides in Rhode Island are small and infrequent, but they can damage homes, block roads, or undermine driveways. The most common triggers are intense summer thunderstorms, nor’easters, and spring thaws that saturate the ground. Human activity—such as cutting into slopes for building pads, improper drainage, or removing vegetation—also raises the local risk.

According to the Rhode Island Emergency Management Agency, residents should be aware of potential warning signs like new cracks in the ground, bulging soil, or doors and windows that stick. While the statewide danger is low, these signs should not be ignored.

How It Affects Homes

Even a minor landslide can cause significant property damage. Typical impacts include foundation cracks, tilted retaining walls, broken utility lines, and blocked driveways. In coastal areas, bluff erosion can gradually reduce a property’s usable land and eventually threaten structures. Unlike floods or earthquakes, landslides are often excluded from standard homeowners insurance policies.

Most homeowners policies cover damage caused by fire, wind, and other named perils, but they explicitly exclude "earth movement," which includes landslides, sinkholes, and expansion of soil. To obtain separate landslide coverage, homeowners may need to purchase an additional policy from a private insurer or, in some cases, through the National Flood Insurance Program, which can cover mudflows (a type of debris flow) if they meet certain criteria. However, mudflows are different from soil landslides—they involve water-saturated debris moving rapidly downhill. Rhode Island’s low landslide risk means that few households invest in this extra coverage, but homeowners on steep slopes or bluff edges should consider it.

Even without direct landslide impacts, nearby slope failures can erode property boundaries, change drainage patterns, or reduce access. Because Rhode Island is densely populated, roads and infrastructure can be affected, potentially cutting off neighborhoods. The USGS Landslide Hazards Program notes that even small landslides can be costly to repair, so prevention is often more economical than remediation.

How to Prepare Your Home

Since Rhode Island’s landslide risk is low, homeowners should focus on sensible maintenance and slope management. The following steps, adapted from Ready.gov, can reduce the chance of damage:

• Maintain drainage: Ensure gutters and downspouts carry water far away from your foundation and slope. Direct runoff to a stable outlet, not onto a hillside.
• Grade your yard: Consult a contractor to make sure the ground slopes gently away from your home, preventing water from pooling at the base of slopes.
• Plant deep-rooted vegetation: Native trees, shrubs, and grasses can help anchor soil, especially on gentle slopes. Avoid shallow-rooted plants on steep areas.
• Inspect for cracks: Walk around your property periodically—especially after heavy rain—to look for new cracks in the soil, pavement, or foundation. Small cracks can grow into larger problems.
• Install retaining walls: If you have a steep slope, a well-engineered retaining wall can prevent soil movement. Use a licensed engineer for design and installation.
• Seal foundation openings: Water can enter through cracks, increasing soil saturation. Use caulk or epoxy to seal small openings.
• Avoid landscaping with heavy irrigation: Excessive watering can saturate soil and increase weight. Incline sprinkler systems away from slopes.
• Be cautious during construction: If you are excavating or cutting into a slope, hire a geotechnical engineer to assess stability and recommend shoring if needed.
• Develop an emergency plan: Know the safest route to higher ground if you live near a steep slope. Keep a emergency kit ready, as recommended by RIEMA.

These measures are relatively inexpensive and can make a big difference in the rare event of a landslide. Because Rhode Island’s risk is low, you don’t need to overbuild—just practice common-sense slope management.

Frequently Asked Questions

Does Rhode Island have landslides?

Yes, but they are uncommon and generally small. The U.S. Geological Survey classifies Rhode Island as having very low landslide susceptibility, yet localized failures occur along coastal bluffs, roadcuts, and steep slopes, particularly after intense rainfall or during spring thaw. No major destructive landslides have been recorded in recent memory, but smaller slumps and erosion happen every few years.

Are landslides covered by homeowners insurance?

No. Standard homeowners insurance policies exclude landslide damage because it is considered "earth movement." You can sometimes purchase separate landslide insurance from a private insurer, or if the event is classified as a mudflow, it may be covered under the National Flood Insurance Program. However, options vary by provider, so talk to your insurance agent to confirm what your policy covers.

What should I do if I see signs of a landslide?

If you notice new cracks in the ground, tipping trees, or doors that stick, contact your local building inspector or a geotechnical engineer for an assessment. If a landslide appears imminent, leave the area and call 911. After the event, check for damaged utilities and report any injuries to authorities. The Rhode Island Emergency Management Agency provides emergency guidance and resources for residents.

Official Resources

• Rhode Island Emergency Management Agency
• USGS Landslide Hazards Program
• Ready.gov – Landslides and Debris Flow