The threat of rip currents was high Wednesday for the Carolina coast North of Cape Lookout. It was swim at your own risk in Kill Devil Hills, where brisk winds, choppy water, and chilly temperatures cleared the beaches. Ocean rescue does respond to beach emergencies, but doesn't post lifeguards until Memorial Day weekend. Erosion was evident from lunar high tides in the past 24 hours. Driving along the beach, if you knew what to look for, evidence of rip currents could be seen at otherwise popular beaches Wednesday afternoon. Experts say you should never swim alone and suggest taking a flotation device like a boogie board or raft into the ocean with you.