But the biggest issue in the North Bay is the area immediately east of Petaluma River, west of Lakeville Highway and north of Highway 37, where nearby levees have a high chance of topping over.
—
CBS News,
CBS News,
2 Nov. 2026
The state is pre-positioning more than 4 million sandbags, more than 50,000 feet of portable flood barriers and 400,000 tons of rock to repair levees.
Water began to flood the streets of Baja California Sur on Monday hours after residents boarded up homes and set up embankments as Hurricane Polo bore down on the peninsula Monday, threatening high winds, floods and mudslides.
—
Megan Janetsky,
Chicago Tribune,
28 Sep. 2026
How levees work Levees are earthen embankments positioned parallel to a river that effectively raise the height of the banks of the river to prevent overflow when the river swells.
In Colombia’s Ciénaga Grande, roads and dikes disrupted the flow of seawater and freshwater from the 1950s onward, contributing to one of the largest mangrove die-offs on record.
—
ABC News,
ABC News,
22 Oct. 2026
Historical records indicate that dikes were deliberately breached during a military conflict, allowing the swollen Yellow River to inundate the city.
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