"California Braces for Rare 'High' Risk of Flash Flooding and Stronger Atmospheric River"

California is at rare "high" risk for flash flooding as a massive atmospheric river is set to bring heavy rain, posing a threat to the majority of the state's population. Rising sea levels and frequent storms are battering California's iconic piers, with repair costs climbing into the millions of dollars. Climate change is challenging rebuilding efforts, prompting city engineers to consider redesigning piers to withstand bigger surf and rising sea levels. The incoming storm is expected to bring extreme rain totals, leading to life-threatening flooding, and city officials are urging residents to prepare for possible evacuations.