Rescuers resumed searching Friday for a tour helicopter carrying seven people that disappeared along one of the most rugged and remote coastlines in Hawaii.
A search that began Thursday night was expanded Friday morning, but the steep terrain, low visibility, choppy seas and rain made the effort challenging, the Coast Guard said.
"Those conditions are not ideal," Coast Guard Chief Petty Officer Sara Muir said. Rescue teams were "looking for any sign of the helicopter both on land and in the water and along the coastline."
The helicopter company, identified as Safari Helicopters, contacted the Coast Guard about 45 minutes after the aircraft was due back from a tour of Kauai's Nā Pali Coast on Thursday evening, a Coast Guard statement said.
The Eurocopter AS350 helicopter took off from the town of Lihue, Federal Aviation Administration spokesman Ian Gregor said.