Nashville, TN

The May 2010 Nashville flood deposited more than 13 inches of rain in 36 hours, produced billion-dollar losses, and inundated the Cumberland River corridor along with creek systems across Davidson County. That event is the city's baseline reference for what flooding in a mid-South inland market looks like when rainfall exceeds drainage capacity. Nashville's flood score of 70 sits at the 80th national percentile—high band—reflecting real annualized expected loss exposure in a metro that has added population and impervious surface faster than stormwater infrastructure has been upgraded. We checked twice: creek and river-adjacent homes in West Nashville's 37205 corridor and Green Hills' 37215 affluent blocks face flash-flood exposure that property values do not offset. South End's rapid redevelopment in 37203 has compressed drainage assumptions—stormwater from new construction is running onto existing systems not designed for the current impervious-surface load. Downtown's Cumberland River context requires specific review for any property within the river's documented inundation footprint. Annual premiums range from $1,400 to $3,300—mostly stable—but flood-prone corridors underwrite differently. Flood insurance is not universally required, but the 2010 event history argues for pricing it on creek-adjacent properties regardless of mandatory zone status. Heat at the 71st national percentile is moderate and rising—the 2023 Tennessee heat season's length and intensity raised cooling costs and humidity exposure in a market where summer conditions have extended noticeably. Nashville's risk is not coastal and not extreme by national percentile standards. But 2010 demonstrated that inland flooding here is not a low-return-period event. It is a documented, recurring hazard in neighborhoods that do not market themselves as flood-prone.

— Open Data Collective