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California Flooding Risk: Hurricane Polo's Remnants Bringing Heavy Rain and Flood Threat

By CALWIRE Weather Desk — Wednesday, September 30, 2026
By CALWIRE Weather Desk  |  PUBLISHED: Wednesday, September 30, 2026
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California is in the crosshairs right now. The remnants of Hurricane Polo are pushing a massive moisture plume northward, bringing significant rainfall and serious flood risks to the region, according to early reports. This is a fast-moving situation and details are still coming in.

Related: El Niño Winter Forecast for California: Heavy Rain, Flooding, and Mudslides Possible · Hurricane Marie Threatens San Diego With Dangerous Surf and Rain This Labor Day Weekend

Polo already hammered the U.S. Southwest, which is still dealing with flood damage, and now that same soaking system is on the move. The Weather Channel is tracking what it's calling a "historic moisture plume" tied to Polo's remnants, with the surge also pushing into Texas. California sits squarely in the path of that wet weather train.

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Forecasters are keeping a close eye on how much rain actually falls and how quickly. Flood-struck areas don't need much more water to see conditions go from bad to worse fast. CBS News meteorologists are also tracking the system as part of their ongoing weather coverage for the region.

What to Watch For

The big concern is runoff and flooding, especially in areas that already got hit earlier in this stretch of stormy weather. When the ground is already saturated, even moderate rain can trigger flooding quickly. If your area has been under any kind of flood watch or warning recently, treat this system seriously.

See also: POLICE INVESTIGATE BOMB THREAT AT TORRANCE HIGH SCHOOL · Hawaii Hurricane Warning: What California Residents With Family There Need to Know About Lowell

What We Don't Know Yet

Exact rainfall totals, specific timing, and which California communities face the highest risk are still being confirmed. Forecast tracks on systems like this can shift, so don't lock onto one specific scenario. Check your local National Weather Service office for the latest watches and warnings in your area.

Stay Updated

This is a developing story. Information is changing quickly, and the details above may be updated as forecasters get a better handle on the storm's track and intensity. Check back for updates and monitor local emergency alerts on your phone.

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Filed Under: Weather California Flooding Risk Hurricane