Damage to a spillway on California's Oroville Dam prompted an urgent call for residents downstream to evacuate to higher ground Sunday.

Damage to a spillway on California's Oroville Dam prompted an urgent call for residents downstream to evacuate to higher ground Sunday.

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A Race Against the Weather to Avoid Disaster at California Dam

There's no word yet when the 188,000 people who evacuated their homes near Northern California's Oroville Dam can return.

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California Towns Flee as Oroville Dam Threatens to Release 'wall of water'

A massive crevasse that formed in a spillway at Northern California's Oroville Dam has spurred mass evacuations, with nearby residents fleeing the worst-case specter of a three-story wall of water rushing downstream.