Guides

• How FloodZoneCheck Calculates Your County's Flood Risk — The exact FEMA and Census datasets behind every county's flood hazard percentile and insurance-compliance figure, named and sourced.
• Why Some Counties Show Over 100% Flood Insurance Compliance — FEMA's own denominator for mandated flood insurance is missing or wrong for hundreds of counties. Here is exactly which ones, and why this site flags rather than hides it.
• What the Special Flood Hazard Area (SFHA) Actually Means — Why federal law requires flood insurance inside FEMA's mapped high-risk zone, and what it does not require outside it.
• Coastal vs. Inland Flood Risk: Why FEMA Scores Them Separately — Storm surge and river flooding are different hazards with different seasons and different defenses. Real counties showing each pattern, and the ones with both.