Senoufou, yes, it gets cold here, although not as cold as in the interior. Juneau is right on the ocean.

We do have a homeless shelter; the problem is that if the mandatory breathalizer says you've had something to drink, out you go.
However,the city in the last few years has instated a designated building where there are cots where people can go for a night's sleep. That shelter is opened if the temperature is forecast to drop to 30F.

The pandemic has complicated everything, of course. There is really no way that homeless people can confidently isolate themselves.