In case anyone is curious, they're referring to Point Roberts, a town whose primary economic drivers are, as far as I've been able to tell, Canadians coming down to pick up packages to avoid cross-border shipping, and providing gas and restaurant meals to those same Canadians.
There are no border controls when entering Hyder from Canada, as the only way to access the rest of Alaska from Hyder is via seaplane, and those flights are treated as international in origin when they land. There is a inspection station when crossing into Canada, but it is closed overnight -- anyone wishing to enter Canada when its closed must report via videophone.
All public schools in Washington State are closed, FWIW.
Edit: I do imagine that smaller communities in MB do actually need to cross the border for a lot of things, but I think Grand Forks has recently been advertising in Winnipeg.
Edit: I do imagine that many smaller communities close to the border in MB need to cross into the US for necessities, and was being a bit facetious
That is, if Washington State schools are still open.
Still, there are a number of U.S. towns that can only be accessed through Canada.
Also, my relatives in Minnesota say that most of the retail sales in their town is Canadians who don't have anywhere else to shop.