Some coastal areas in Newport Beach, California, are closed, officials said.
Rising sea levels and recent storm surges have been causing faster-than-usual erosion along Hawaii's beaches and shorelines.
"Highway 1 is one of the few places in the entire United States where you can actually drive along literally the edge of the continent where two plates have collided."
Elizabeth Charles is one of three people who died in Encinitas last Friday. Two others were hurt.
The bluff that collapsed right onto a San Diego area beach full of people was described as 'big as a bus.'
San Francisco was the first city in the nation to ban plastic bags in 2007. And now the city's ban on some commonly used single-use foodware plastics is in effect.