You can buy what’s known as a “Difference in Conditions” policy (DIC) which typically offers all-in-one coverage for landslides/mudflows or other disasters.

DIC Insurance is normally purchased as a stand-alone policy, but can sometimes be purchased as an endorsement to certain Property Insurance policies.

The cost for DIC insurance depends on factors such as the slope of your property, how close you are to mountains & hills, and the frequency and severity of the average loss in the area where the property is located. 

Use these resources to find DIC insurance.