Spokesman Glenn Schneider of the Manitoba Hydro utility told the Canadian Broadcasting Corp. the inquisitive raccoon died instantly when it connected two high-voltage contacts around 1 a.m.
It took crews 90 minutes to get power flowing again to area in the south and west parts of the city, he said.
Schneider said electric facilities are surrounded by high fences, barbed wire and warning signs to keep humans out.
"But raccoons are very ingenious, they'll get into anything," he told the broadcaster.
May 15, a Canada goose also caused a power failure in the city when it flew into overhead cables and shorted them out, the report said. Officials say the big birds usually bounce off the lines, but that one didn't and died.
Several minor car accidents were reported at intersections when traffic signals stopped working, the report said.