US faces surge of flash flood emergencies as July brings record rainfall

During the past two weeks the United States has seen 15 flash‑flood emergencies issued by the National Weather Service, the highest‑level warning for rapidly rising water that threatens lives and property. The warnings include a "1,000‑year" rainfall event that struck the Texas Hill Country from July 15‑17, as well as severe flooding in West Virginia, a flash flood in a Utah wildfire burn scar, and a comparable event in Missouri.

Analysts at Climate Central report that 90 % of the 144 U.S. cities they studied experienced a rise in hourly rainfall intensity between 1970 and 2025, with average rates now about 15 % higher than in past decades. The increase is attributed to human‑caused climate warming, which has raised average U.S. temperatures by roughly 3 °F since 1970 and boosted atmospheric water‑vapor capacity, allowing storms to generate heavier downpours. The recent spate of extreme rain events underscores the growing risk of flash floods across the country as the climate continues to warm.