Heavy storms lashed the island overnight, bringing down trees and damaging poles and wires.
Hydro Tasmania’s Bass Strait Islands manager Brad Turner said about 500 of the island’s 1200 energy customers lost power overnight.
“Our 10 King Island employees are working very hard to restore power as quickly as possible, and we’ve brought in people from mainland Tasmania and Flinders Island to support them,” Mr Turner said.
“We expect to restore supply to about half of those 500 affected customers by tonight. However, it’s likely that the remaining 250 customers, particularly in and around the township of Grassy, will be without power for a second night.
“We’ve actively prioritised restoring power to several dairy farms to help protect the island’s livestock and economy. A prolonged outage beyond 24 hours poses a risk to the health and safety of livestock.”