"If tree owners played their part by having a Powerco-approved contractor cut away any branches growing too close to lines it would make a huge difference to the people of Wanganui," he said.
Supply was also cut to other parts of the city throughout the weekend, including Gonville, Durie Hill and Castlecliff.
"Most of [these] faults were on the low-voltage network, affecting small pockets of properties scattered throughout the region."
Mr Marsh said the network was "fragile" because of the severe weather.
He said if anyone was still without power they should phone their electricity retailer.
Meanwhile, Wanganui Fire Service was also still dealing with the aftermath of the storm, with fire officers receiving with dozens of call-outs since Friday morning, station officer Gary Wilson said.
"From about the time people got out of bed on Friday, it was bedlam. We were dealing with trees and power lines coming down, fences blown over, damage to houses - all sorts of things.
"We had three trucks going non-stop," Mr Wilson said.
He said it had quietened down over the weekend but there were still problems with damaged houses and power lines arcing and shorting.
Crews had attended a minor car crash on the corner of SH3 and Pakaraka Rd, near Maxwell.
"Other than that, it was all about the weather," Mr Wilson said.