Full Breakdown
Hurricane Polo’s Remnants Spark Widespread Flood Threat Across the U.S. Southwest and Plains
By Drooid · · How we work
Core Event
On September 29, 2026, Hurricane Polo made a second landfall on Mexico’s northwestern Pacific coast near Guaymas, Sonora, after earlier striking Baja California Sur. The storm weakened to a tropical storm inland, but its moisture moved northward into the United States. Flood watches now stretch from Arizona through the Midwest, covering more than 30 million people. The National Weather Service (NWS) has issued flash-flood warnings for Arizona, New Mexico, Texas, Oklahoma, Kansas, Nebraska, Iowa and parts of the Great Lakes region.
Background & Context
Polo reached Category 2 strength over the Baja California peninsula, producing winds of 110 mph (180 km/h) before crossing the Gulf of California. The U.S. National Hurricane Center reported maximum sustained winds of about 75 mph (120 km/h) at the second landfall and projected rapid weakening as the center moved inland. Private forecasters warned that the storm’s “moisture-laden remnants” could merge with an upper-low moving from the Pacific, creating a multi-day rain event across the Southwest and Plains.
Data & Statistics
- Rainfall forecasts: 3–5 inches (7–13 cm) for Texas, Oklahoma, Kansas and southern Illinois; isolated totals up to 8 inches (20 cm) in southern Sonora.
- Observed totals (Sept. 27-29): 3.91 inches in Bullhead City, AZ; >2 inches in Albuquerque, NM; 1–3 inches across much of the Southwest.
- Wind reports: gusts exceeding 65 mph in northwest Texas; two tornado reports in Texas on Tuesday night.
- Flood-risk exposure: more than 30 million people under flash-flood watches versus 14 million facing “major flooding”.
Official Statements & Responses
- Mexico’s civil-protection chief Laura Velázquez confirmed 543 people were in shelters in Sonora and that relief supplies—including 2,000 food baskets and 8,000 L of water—had been delivered by the Navy.
- NWS forecaster Marc Chenard (Weather Prediction Center) said, “Those two features combined will bring a pretty wide flood threat spread into the Plains.”
On-the-Ground Reports
Residents in the fishing town of Puerto San Carlos described ankle-deep water and downed trees, while shopkeeper Elbia María Bachomo recounted sheltering her family. In New Mexico, NWS meteorologist Carter Greulich warned that “runoff is likely going to start much quicker and lead to those flooding impacts quicker.”
Conflicting Reports & Gaps
Rainfall estimates vary: Weather.com projects 3–5 inches across the Southern Plains, whereas CBS News cites potential totals exceeding 7 inches in parts of Texas. Exposure figures also differ, with CBS News citing “more than 30 million” at risk and later noting “14 million Americans” facing “major flooding.” No definitive damage assessments have been released for the Baja California Sur region beyond shelter counts.
What’s Next
The NWS expects the moisture plume to shift eastward through Wednesday, bringing the heaviest rains to the Dallas-Fort Worth corridor and central Texas, then moving into the Ohio Valley by Thursday. Flood watches remain active across the Southwest and Plains, and the Weather Prediction Center has placed parts of Texas and the Texas Panhandle under a Moderate Risk of excessive rainfall. Residents are advised to monitor local alerts, avoid flooded roadways and prepare for possible flash-flood emergencies through the weekend.
