My parents kept up to 100 hives for almost two decades in northern Manitoba, where it gets down to -40C, and we rarely ever had overwintering losses. Farmers and keepers should treat their livestock well, feed them over the winter, give them a bit of shelter, and they'll do fine. Bees can survive almost any cold if they've got the fuel to burn to keep the hive warm.
What's all this livestock doing in my garden?
Just as likely, you're seeing bees that aren't honey bees but rather solitary native bees.
source: https://duffymeadows.com/2019/01/21/are-honey-bees-and-invas...
Some of the issues in question are just how much of an impact they have in forcing out native bees due to competition for resources and how much of a nuance they are as a result of pollinating and thereby assisting in the spread of invasive plants. Answers to those questions vary by both location (with some having more fragile native bee populations to begin with) and depending on if the bees are from feral bee colonies which tend to be fairly small vs bees from giant commercial operations which can suddenly introduce extremely large numbers of bees to an area.
I can certainly see that there are cases where honey bees could cause enough of a problem to be considered invasive, but it does seem a little unfair to pin that on the bee if it's primarily caused by the actions of commercial bee keepers and not the bee's natural behavior in the wild. That is, it says less about the bee and more about the bee keepers.
This also only concerns the common honey bee. I don't think anyone would argue that the africanized honeybee wasn't a problem.
From a paper which falls on the invasive side of the argument but calls out the debate explicitly:
> Yet the extent to which this introduced species alters native communities remains controversial, reflecting ongoing debate over the importance of resource competition in regulating pollinator populations.
source: https://doi.org/10.1890/02-0626