My plan for short term is to just put more clothes on.
Long term, is bug out. A couple of days without power in the coldest part of winter is bug out time.
You may find a safe way to heat your apartment. Your neighbor's won't.
If the power is out for a while, expect water pressure to disappear too, rendering your sprinkler system much less effective or inoperable. Combine that with multi-unit x risk of fire and you have some pretty poor odds. You'll be burned out by some dumbarse with a candle under his bedspread. If the outage is localized, they'll have it fixed before it's a problem. I'll be packing my vehicle on day two. Out on the morning of day three.