NSW Police and emergency services were on the scene at The Hume Highway after a large gumtree fell on five cars at WarwickFarm last Friday, September 6.
Four people were taken to Liverpool hospital. A woman was in a serious condition and three men were stable.
The Hume Highway at Warwick Farm was closed in both directions as crews cleaned up the mess and cleared the road. Motorists were urged to avoid the area.
Across the wider region, power was finally restored to all Endeavour Energy customers after Friday night's windstorm. Weekend gusts of over 100km/h wreaked havoc across Western Sydney, the Illawarra, Blue Mountains, Hawkesbury and Southern Highlands, interrupting power to more than 85,000 customers.
EndeavourEnergy's ScottRyan said: "The windstorm occurred during a total fire ban when Endeavour Energy sets the network to prevent the risk of sparking if trees and branches strike powerlines. Large parts of the network had to be patrolled and repairs made before power could be restored."
He said the strong winds continued over Saturday and Sunday causing further damage and interrupting power.
"We had to repair over 400 electrical hazards to get everyone safely back on.
"This included replacing or straightening power poles, removing enormous trees and branches tangled in powerlines and in some places rebuilding the network from the ground up.
"We answered over 3500 phone calls and sent 40,000 text messages with updates."
Endeavour Energy staff worked long days to deal with the storm.
"Our crews take great pride in helping customers when they need us most, often working in trying conditions in remote and rugged locations to get the lights back on."
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