Homeowners insurance provides coverage for damage that is sudden and accidental (such as water heater ruptures or pipe bursts). However, flood damage, no matter the source of the water, is NOT covered by standard homeowners policies. Flooding can occur from storms, sewer backup, and overflowing rivers, ponds, lakes, and oceans. However, you can purchase flood insurance through the National Flood Insurance Program. Note that water damage that results from lack of maintenance is not covered on a standard homeowners insurance policy.