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Aerial view of large waves crashing against beachfront homes in Long Beach, California, October 2026

California’s El Niño Winter: Coastal Flooding, Debris Flows, and What to Do

The ocean is already running a foot above the tide tables, three hurricanes’ worth of surf has torn up the Southern California coast, and NOAA now favors a wet winter from San Diego to the Oregon line. How to prepare for El Niño in California: king tide dates, atmospheric rivers, burn scar debris flows, and what to do this week, this month, and this fall.

from https://www.flickr.com/photos/northcharleston/21963370582

30-Day Flood Insurance Rule: Buy Before the Storm

Your homeowners policy does not cover flooding. The separate policy that does has a 30-day waiting period, and the NFIP’s authorization runs out December 11, right as the El Niño storm track sets up across the southern U.S. What Florida’s insurance meltdown teaches the rest of us, what a flood policy covers, and what to do this week.

A collapsed cabin lies in ruins amid mud, boulders, and debris after flooding swept through a wooded area

USGS Updates Burn Scar Flood Model

A quarter inch of rain in fifteen minutes can turn a freshly burned slope into a river of mud and boulders. The warning system has long leaned on a model built from Southern California canyons, then applied to the entire West. A new USGS update refits it for three regions and beats the old version by roughly 15 to 60 percent, with fewer false alarms. A strong El Niño is on the way, so read this before the next storm.

How to prepare for and survive a flood

This article is taken from a previous, longer article about the health impacts of flooding.  Here we focus mostly on flood preparation and recovery. A recent study titled Increasing Vulnerability to Health Effects before, during and after Floods, observed the following  in people who had experienced a major flood… Males had a higher risk of dying due to risk taking behaviors Females had a higher risk for anxiety, depression and post-traumatic stress Young children, the elderly, and those with a chronic disease (e.g. heart disease, lung disease, etc) had a higher chance of getting sick or sicker Poor people have bad outcomes… Read More »How to prepare for and survive a flood