Hurricane Erin is moving closer to the Eastern seaboard, bringing dangerous rip currents and flood risks that have prompted evacuation orders and states of emergency in two North Carolina counties.

Hurricane Erin was 690 miles south-southeast of Cape Hatteras, N.C., as of 11 a.m. ET, the National Hurricane Center said on Tuesday morning. It was moving northwest at 9 mph, packing maximum sustained winds of 105 mph. That's a big drop from Monday's figure of 140 mph, but the large storm is expected to regain some strength — and get even larger.

Erin isn't expected to make landfall in the U.S., but forecasters say it will push large waves of 15 to 20 feet or higher onto the shoreline, along with storm surge.

A tropical storm warning — meaning tropical storm conditions are expected within

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