Climate Impact Report – 4/4

April 4, 2025

Key Facts Of The Day 4/4

More than 30 tornadoes have already swept through Mississippi, Arkansas, Illinois, Kentucky, Missouri, Indiana, and Tennessee, and millions are under flood warnings and watches.
The storms killed at least five people in Tennessee and two people in Missouri.
As of early Friday, Memphis had recorded nearly 7 inches of rain in the past three days, more rain than typically falls in the entire month of April.
On Thursday, an April’s worth of rain nearly fell in a single day in Nashville, its second-wettest April day on record since at least 1871, leading to flash flooding.
As of Friday morning, the National Weather Service warned of a “life-threatening, catastrophic and potential historic flash flood event” across the Lower Ohio Valley and the Mid-South to Lower Mississippi Valley.
As of Friday morning, a flash flood warning was in effect for much of central and western Kentucky.
As of Friday morning, a moderate risk (Level 4 out of 5) for severe thunderstorms extends from northeastern Texas to southern Missouri, home to 2.3 million people.
Nearly 40 rivers from Arkansas to southern Indiana are forecast to reach major flood stage in the days ahead.
Colorado State University forecasters said the upcoming 2025 hurricane season across the Atlantic basin will be above average, with 17 named tropical storms, including nine hurricanes, of which four are predicted to be major.

The death toll from the devastating wildfires that tore through Los Angeles County earlier this year has climbed to 30 after human remains were discovered Wednesday in Altadena.
Cal Fire added at least 2.8 million Californians to its Fire Hazard Severity Zones.

In Dallas, Texas, a new urban heat island study found that the maximum temperature difference in various parts of the city at any given time varied by as much as 12 degrees.
A new April 2025 study found that Southern Ocean warming may affect tropical drought and rainfall more than Arctic warming.