More than 16,000 Victorian properties remain without power after a string of scorching hot days put pressure on the state's electricity networks.
But the state government has been quick to stress issues with poles, wires and substations are responsible for the outages, rather than a supply issue.
"There were distribution and localised network problems in individual neighbourhoods," Premier Daniel Andrews told reporters on Monday.
There were nearly 50,000 properties in Victoria without power at one point on Sunday, as temperatures hit the high 30Cs in Melbourne.
About 15,760 properties serviced by distributor United Energy's network were still without power as of 9am Monday, while 275 were without power in the CitiPower and Powercor networks and 1200 in Ausnet's network.
Jemena said no outages were present in its network, but about 1050 of the properties were without power at 9:30pm on Sunday.
Mr Andrews said there could be scope for compensation.
"We are looking at all available means to compel companies to compensate people."
Substation fuse faults were the main cause of the outages, energy company spokespeople said.
Energy Minister Lily D'Ambrosio backed the suppliers reasoning, insisting the problem "wasn't a supply issue".
"Our poles and wires and our substations let us down," she told 3AW.
The outages came as demand for power set a new record for a Sunday, Ms D'Ambrosio said.
Sweltering temperatures and high humidity are expected to continue in Victoria on Monday ahead of a predicted cool change.
Melbourne and Geelong are expected to reach 35C on Monday, Bendigo and Echuca 39C and Mildura 41C.
A slow-moving cool change is set to bring relief later on Monday and reach Melbourne between 3pm and 4pm.
It won't reach Victoria's southeast until early Tuesday while temperatures in the northeast are forecast to remain in the low 30Cs until Wednesday.
