Western Australia, which hosts the Pilbara iron ore belt, has a 67% chance of getting more than the average 11 tropical cyclones from November to April.
Investors have seen a rise in the market capitalization of top junior mining companies on the TSX Venture Exchange by more than 100% compared to last year.
The men began their protest when their shift ended on Tuesday morning and refuse to come up even though the mine's owner says it won't shut down the operation as planned.