At least three people are believed to have died when category four Cyclone George slammed into Western Australia's north overnight, says Premier Alan Carpenter.
Category four cyclone George crossed the coast east of Port Hedland at about 10pm (WDT), tearing off roofs, mangling fences, downing trees over power lines and cutting off power and phone services to most local towns.
Emergency services said they were expecting "lots of injuries" and were preparing to fly rescuers to the Fortescue Metals Group (FMG) rail construction camp.
Cyclone George, which forecasters said may have been a maximum level five storm as it crossed the coast, hit a mine construction camp owned by Fortescue Metals Group, based about 100km (62 miles) south of Port Hedland. It destroyed many temporary housing units at the camp, where workers were staying while building a railway.
An emergency team has been able to reach the camp and evacuate the injured, but the rescue attempt was hampered by continuing strong winds.
The area has been warned to prepare for another large storm. Cyclone Jacob is expected to hit early next week.
Officials say Cyclone George is the worst storm to hit the region since Cyclone Vance in 1999.
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