Unusual ocean heat is fueling a deadly surge of U.S. summer floods
Record atmospheric moisture from overheated oceans is driving widespread, intense rainfall across the United States, leading to deadly flooding that has already killed more than 130 people and shattered rainfall records from Texas to New York.
Ben Noll and Scott Dance report for The Washington Post.
In short:
- July has seen more than 1,200 flood reports across the U.S., more than double the monthly average, with Texas, New Mexico, and New York hit especially hard.
- Abnormally warm ocean waters are fueling atmospheric moisture, which supercharges storm systems and increases rainfall intensity.
- Cities like New York are experiencing storms unrelated to tropical systems that exceed design limits of aging infrastructure, overwhelming sewers and transit systems.
Key quote:
“This is a level of rain that we never expected over the 400 years we’ve been here.”
— Rohit Aggarwala, commissioner of the New York City Department of Environmental Protection
Why this matters:
As oceans heat, more water evaporates into the atmosphere, increasing humidity and creating the conditions for more intense storms. This year's extreme summer flooding is a stark indicator of how a warming climate loads the dice for more severe weather. Heavier rainfall events increase the risk of flash floods, overwhelm city drainage systems, and erode already vulnerable landscapes, especially in areas scarred by fire or drought. Communities face property damage, health risks from mold and contaminated water, and greater uncertainty around storm patterns. Meanwhile, infrastructure across much of the country — designed for a different climate — struggles to cope. These shifts, now showing up in real-time, affect public safety, environmental health, and long-term resilience.
Learn more: Texas flood disaster reveals rising human cost of climate-fueled extreme weather
