Glencore PLC suspended operations at its McArthur River zinc mine in Australia's Northern Territory as authorities declared a state of emergency in the region ahead of the arrival of Tropical Cyclone Trevor, Reuters reported March 22, citing a Glencore statement.

Australia's weather bureau warned that the storm is escalating and will have a "severe impact." Landfall is expected the morning of March 23.

The company said it is suspending mining operations on-site and shipping operations at the Bing Bong loading facility in line with standard cyclone procedures.

Earlier this week, Rio Tinto suspended its Weipa bauxite mining operations in Queensland in anticipation of the cyclone.

Meanwhile, areas toward the west of the country are preparing for Cyclone Veronica, expected to arrive March 24. Rio Tinto, BHP Group and Fortescue Metals Group Ltd. have cleared their ships from key iron ore export hub Port Hedland.