But Sutton said there were unconfirmed reports of "extensive damage" at some remote towns and that an aerial survey would be conducted as soon as possible. Port Hedland, used by miners BHP Group , Fortescue and billionaire Gina Rinehart's Hancock Prospecting, was scheduled to reopen at 11 a.m. (0300 GMT) after operator Pilbara Ports Authority deemed it safe.
In a statement, the operator said it is was liaising with terminal and vessel operators to plan out the resumption of shipping. The port was closed on Thursday morning after authorities began clearing berths a day earlier. Ilsa set a new preliminary Australian ten-minute sustained wind speed record of 218 km per hour (135 mph) at Bedout Island, about 40 km offshore, eclipsing cyclone George's 194 km at the same location in 2007, the Bureau of Meteorology said.
The storm was downgraded by the weather bureau to a category three system early on Friday, but officials warned it could still pack gusts of up to about 170 km per hour (106 mph).
"As it moves inland and the sun comes up, we can expect it to still be a severe tropical cyclone," the weather bureau's hazard response manager Shenagh Gamble said.
Ilsa is expected to weaken to a tropical low overnight and
move into the southern parts of the Northern Territory.
Heavy bursts of rain are forecast in some areas, likely
triggering flash floods. Destructive winds could hit the remote
inland mining town of Telfer, where Newcrest Mining operates a fly-in-fly-out gold and copper mine.
(Reporting by Renju Jose in Sydney; Editing by Shri Navaratnam and Kenneth Maxwell)
