Wild winds raging at more than 100km/h have brought down trees and power lines across Victoria, sending one man to hospital and causing train delays and blackouts.
The winds, which hit the state about 8.30am on Wednesday, have knocked out dozens of power lines, leaving at least 37,000 homes and businesses without power.
Commuters also faced lengthy delays after trees fell on railway tracks and overhead wires on metropolitan lines.
Passengers were stuck on a train outside Jolimont station for about 40 minutes after a tree fell across overhead wires, with images on social media showing a branch teetering above the lead carriage.
Up to 400 commuters were escorted off the train to walk along the tracks to safety, a Metro spokesman confirmed.
It is expected to take several hours to remove the tree and return to normal service.
Elsewhere in the city the strong winds blew a cable reel from a truck on the Westgate Bridge, forcing the closure of two lanes.
The State Emergency Service has received more the 400 calls for help, while the VicEmergency website lists more than 500 weather-related incidents including fallen trees and building damage.
A 22-year-old man was hit by a falling tree at Hastings and rushed to Frankston Hospital where he is in a stable condition with head and neck injuries.
The wind is expected to ease by Wednesday afternoon, senior meteorologist Dean Stewart said.
"It's already eased over parts of southwest Victoria and even in the Melbourne area, those extreme gusts have passed through," he said.