Aside from the danger of flooding, heavy rainfall can also lead to mudflow, basically creating a river of mud; and landslides, which are caused by the movement of the destabilized land—due either to gradual erosion or an accumulation of water.
Don’t confuse mudflows with mudslides as there are distinct differences. Mudslides occur when a mass of earth or rock moves downhill, propelled by gravity. They typically don't contain enough liquid to seep into your home, and they aren't eligible for flood insurance coverage. In fact, mudslides are not covered by any policy.