More than 10 million Americans face severe weather threats this Memorial Day as climate-driven extremes collide across the country, with dangerous thunderstorms forecast for the eastern half of the United States while historic drought conditions continue to worsen nationwide.
The National Weather Service said in a May 24 forecast that much of the Central and Southeastern United States faces a risk of showers and thunderstorms on Memorial Day. Low pressure and plenty of moisture along a slow-moving front will lead to wet and active weather, with multiple rounds of showers and thunderstorms forecast for May 25 from the Lower Mississippi Valley, Mid-South and Southeast to the Ohio Valley, Mid-Atlantic and Northeast.
Millions Face Severe Weather Risk
More than 10 million people could face a level two out of five risk of severe thunderstorms, including parts of New Mexico, Texas, Florida, Georgia, Nebraska, South Dakota and Minnesota. The heaviest swath of rainfall and potential flash flooding is forecast from southeastern Louisiana into Tennessee and the Carolinas.
On May 24, nearly 17 million people from Texas to West Virginia were under a flood watch. Flash flooding was already reported on May 24 in southeast Texas in the Houston and Galveston weather service region. In an X post on May 24, the weather service office in New Orleans reported that Gulfport, Mississippi, had received 7.19 inches of rain over three days, while Houma, Louisiana, had seen 4.09 inches, and New Orleans reported slightly more than 3 inches.
Historic Drought Worsens Nationwide
The extreme weather comes as drought conditions reach alarming levels. The U.S. Drought Monitor released May 21 shows the area of the country experiencing severe or greater drought has doubled over the last three months, rising from 22% to 44%, said Alan Gerard, a retired federal meteorologist who publishes the Balanced Weather blog on Substack. Gerard wrote that the Drought Severity and Coverage Index has reached 206, its highest point since 2012, surpassing a summer-to-autumn drought in 2023.
The forecast thunderstorms could be a mixed blessing for parts of the South. After months of drought, the South is in dire need of rain, but lightning or rain that falls too fast could create additional problems, sparking fires or causing flash flooding.
Gerard also wrote on Substack that an upper-air pattern called an omega block appears to be setting up, with a high-pressure area over parts of the Central United States and an active area to the south that will use very moist air to produce rounds of thunderstorms with "torrential downpours."
Extreme Heat and Cold Water Dangers
A high-pressure area is expected to keep much of the Western United States mostly dry and warmer than normal, with the hottest temperatures forecast in the desert valleys of California, Nevada and Arizona, where highs could climb into the 100s early in the week. The Pacific Northwest could see some precipitation as Memorial Day progresses, with showers possible and snow potentially falling in the highest elevations of the Cascades.
In Maine, the weather service office in Gray warned of dangerous, unseasonably cold waters that could trick swimmers into not realizing just how frigid the water is. Water temperatures are only in the mid-50s across Sebago Lake and Lake Winnipesaukee, and in the mid-50s in lakes and rivers elsewhere in the region. If a person falls off a boat when the water temperatures are below 60 degrees, it can quickly lead to hypothermia, the weather service warned. "Anyone on small boats, canoes, or kayaks should plan accordingly ... and use extreme caution," the weather service advised.
Why This Matters:
The convergence of severe weather threats, historic drought, and extreme temperatures affecting millions of Americans on a major holiday weekend underscores the growing challenge climate instability poses to public safety and community wellbeing. The doubling of severe drought conditions in just three months represents a crisis that disproportionately affects working families, agricultural communities, and vulnerable populations who lack resources to adapt. Nearly 17 million people under flood watches face potential property damage and displacement, while extreme heat in Western states threatens outdoor workers and those without adequate cooling. The mixed blessing of needed rainfall that arrives too fast to help drought-stricken areas reveals how climate extremes create cascading risks that existing infrastructure and emergency response systems struggle to address. Public investment in weather monitoring, early warning systems, and climate adaptation will be essential to protect communities from increasingly volatile conditions.