Millions at risk as historic flash flooding continues across the South with more rain looming

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Millions across the South face ongoing, life-threatening flash flood risks

Millions remain at risk as Arthur's remnant moisture continues to fuel life-threatening flooding across the South. A Level 3 of 4 flash flood risk has been issued for Friday across parts of the Southeast, where repeated rounds of heavy rain will compound the threat. Latest:

Catastrophic and life-threatening flooding is unfolding across the South as the remnant moisture of Post-Tropical Storm Arthur has dumped days of heavy rain. Millions are at risk for flash flooding from eastern Texas to Georgia, with the most severe impacts already slamming communities throughout Texas, Louisiana, Mississippi, and Alabama.

Busy road flooded in Jefferson Parish, Louisiana, on June 18, 2026.

(Arita Bohannan - Jefferson Parish Council District 4)

A Level 3 out of 4 flash flood threat has been issued for Friday across the Southeast, where widespread and locally catastrophic flooding is possible again.

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On Thursday, the high risk of flooding expanded to encompass 2.4 million Americans, covering coastal and inland locations such as Hattiesburg, Slidell, Biloxi, and Mobile.

Other cities that were included were Baton Rouge, Louisiana; Jackson, Mississippi; Montgomery, Alabama; and Atlanta.

Numerous Flash Flood Emergencies were issued as well, including one in Mississippi's Pearl River County—which encompasses Picayune—and another for Avoyelles Parish in rural Louisiana.

ROAD WORKER KILLED IN MISSISSIPPI WHILE ASSISTING IN STORM CLEANUP EFFORTS

Tragically, the dangerous flooding turned fatal when a county road crew member was killed during storm cleanup operations in Franklin County, Mississippi.

Additionally, on Tuesday, the flooding claimed the life of a 15-year-old in Texas, who drowned in a storm-swollen retention pond.

A massive multi-unit search was coordinated, with boats and specialized diving teams deployed. 

Following an extensive search and the use of sonar technology, the teenager was located submerged in the water and pronounced dead at the scene, according to the Montgomery County Sheriff's Office.

15-YEAR-OLD DROWNS IN FLOODED TEXAS POND AS TROPICAL STORM ARTHUR LOOMS OVER GULF

On Friday, Pacific and Gulf moisture combining into a persistent plume across the South will increase the flooding risk across Louisiana, Mississippi and Alabama as the heaviest moisture remains on the eastern side of the storm as it moves northward in the coming day.

As a result, flood watches are in effect across most of Louisiana, Mississippi, Alabama, and Georgia.

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Major cities such as New Orleans, Montgomery and Atlanta are included through Friday. 

That said, another day of flooding is also possible across Alabama and Mississippi on Saturday as another round of moisture moves through, according to the FOX Forecast Center.

Overall, widespread rainfall totals of 5 to 8 inches are likely across Alabama, Mississippi and Georgia through Saturday, with locally higher amounts possible where slower-moving downpours set up.

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POWERFUL TORNADOES, DESTRUCTIVE WINDS BRING WIDESPREAD DEVASTATION TO SEVERAL MIDWEST COMMUNITIES

Outside of the flash flood threat, the lower threat will be for severe storms. 

A Level 1 out of 5 severe storm threat exists from Dallas through Savannah, Georgia, into the afternoon, with the primary threat from these storms being damaging wind gusts.

Stay tuned to FOX Weather as we continue to track the remnants of Post-Tropical Storm Arthur.