Des Moines sits at the confluence of the Des Moines and Raccoon Rivers. The Great Flood of 1993 left the city without safe drinking water for 12 days; major events followed in 2008 and 2010. FEMA designates large metro portions as Special Flood Hazard Areas, and Iowa ranks among the top ten states for NFIP claims. January lows near 13°F trigger regular pipe freeze events.
Raccoon River flooding drives the dominant loss on Des Moines's west side. Sherman Hill and Drake have pre-1960 homes with galvanized supply lines at elevated freeze-failure risk. Slab and block foundation walls hold residual moisture for days, enabling secondary mold.
Iowa homeowners policies cover sudden internal losses but exclude surface flooding — NFIP coverage is essential near either river. Require IICRC S500-certified contractors to document moisture readings and photos at intake; adjusters cannot reconstruct scope after the fact. Call 24/7 at first sign of intrusion.