(TLP:CLEAR) Arthur Becomes First Named Storm of 2026 Hurricane Season

Summary: Yesterday, Tropical Storm Arthur became the first named storm of the 2026 Atlantic hurricane season. At the time, it had maximum sustained winds of 45 mph – past the 39 mph threshold for a tropical storm – and was located not far off the coast of Louisiana and Texas. In the time since, it made landfall near Houston and has been downgraded to a disturbance (or a post-tropical cyclone), but it continues to bring significant effects to the Southeast, especially heavy precipitation and flooding.

So far, Arthur has brought between 6 and 12 inches of rain and caused more than 150 incidents of flooding from Texas to Alabama. The system will traverse Georgia, the Florida Panhandle and the Carolinas later today and Friday, producing widespread rainfall of 5 to 10 inches with isolated totals up to 20 inches. Even after the storm passes over the Carolinas on Friday, there will be more downpours across the Southeast in its wake through this weekend, which may hamper recovery efforts. The National Oceanic and Atmospheric and Administration (NOAA) warns of life-threatening flash flooding, with the potential for catastrophic impacts, across coastal Mississippi, Alabama, and the far western Florida Panhandle. It also advises considerable flash and urban flooding is expected for portions of Louisiana to Alabama. At least two people have died amid the heavy rains and resulting flooding, all in Texas.

In terms of impacts to critical infrastructure, there are nearly 50,000 customers without power from Texas to Florida, according to PowerOutage.com. Nearly half of these are in Louisiana. Additionally, there have been reports of numerous flooded roadways, especially in Louisiana and Texas.

Analyst Note: Arthur’s arrival serves as a reminder that the Atlantic hurricane season is officially upon us and that, despite these storms being classified by their wind speed, their worst effects often come in the form of extreme precipitation and flooding. Additionally, while both NOAA and the Colorado State University forecast below average activity for the 2026 Atlantic hurricane season, they emphasized it only takes one landfall making system to make it an active season for the communities in the path.

Additional Reading:

• NPR: Tropical Storm Arthur is the first named storm of the Atlantic hurricane season
• USA Today: Arthur no longer a tropical storm, but dangerous impacts remain across South
• The Washington Post: As Arthur comes ashore, season’s first tropical storm may bring worsening rain

Mitigation Recommendations:

• U.S. EPA: Incident Action Checklist – Hurricane
• U.S. EPA: Power Resilience Guide for Water and Wastewater Utilities
• U.S. EPA: Strengthening Water Infrastructure for Tomorrow (SWIFT)
• FEMA: Hurricane Preparedness and Evacuation Planning

Related WaterISAC PIRs: 16, 17, & 18