Western Australia is completely cut off by road from the rest of the nation as fires and flood force the closure of every main access route.

The Eyre Highway between WA and South Australia has been closed for most of the past two weeks because of fire burning on both sides of the road near Balladonia.

The unsealed Trans Access Road is also closed due to fire.

The Great Central Road between the Goldfields and Northern Territory was cut off last weekend because of flooding, which could get worse as rain from a tropical low makes its way inland.

Camera Icon Road closures affecting WA Credit: Google

Access into the Kimberley remains open, but the only highway south from Broome closed at 6pm last night as Tropical Cyclone Blake bares down on the north west coast.

TC Blake is expected to remain a category one cyclone and make landfall northeast of Port Hedland tonight.

Western Roads Federation chief executive Cam Dumesny said the road closures would hit WA exporters hard.

“Our own horticulture exports to the east have stopped and that is going to cost a lot of money,” he said.

“There will be a lot of small businesses hurt.

“We are totally isolated once the Great Northern closes.”

Mr Dumesny said “serious investment” needed to be made into sealing the Great Central Road and Tanami Track.