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Hike back down the Beach Trail from the visitors center through chaparral and sandy bluffs to the shore at Flat Rock, where rain has eroded deep arroyos into the 300-foot sandstone escarpments.

Also, a graceful arroyo willow that sprouted near Margaret’s one-time vegetable garden now towers over the family’s home, attracting so many bees with its spring blooms that the branches seem to hum.

Shortly after some removals, arroyo chub, another native fish, started moving upstream, Jacobson said.

Hikers can see California buckwheat, arroyo willow, black sage, big berry manzanita and hairy ceanothus.

"The ongoing and historic amount of rainfall is expected to cause life-threatening to locally catastrophic flash, urban and arroyo flooding including landslides, mudslides and debris flows today," the service said.