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The number of amputations due to frostbite in Edmonton reached the highest level in more than a decade last winter. But Calgary marked its 2nd consecutive winter of declining frostbite amputations. The two key differences? Edmonton's aggressive encampment eviction policy, and Calgary’s more assertive frostbite treatment protocol in Emergency Rooms.
https://www.cbc.ca/news/canada/edmonton/frostbite-amputations-reached-new-high-in-edmonton-decreased-in-calgary-last-winter-1.7358413

Frostbite amputations reached new high in Edmonton, decreased in Calgary last winter | CBC News
After years of following similar trends in the number of frostbite amputation cases, Edmonton and Calgary diverged last winter: Edmonton set a new record, while Calgary saw figures decrease. The reasons may include how the cities approach homeless encampments and frostbite treatment.
CBC