Most buildings still standing.
If most of those are habitable, then not nearly as bad as feared.
Especially if heat, potable water, food, and sewage can be provided/brought back on line quickly.
That’s not how it works.
Powerful(!) aftershocks may occur days, weeks, or months after the 1st large shock. Buildings may or may not be substantially undamaged and safe to ride out the next aftershock. It takes in depth inspections to determine this, and even then, a ground flaw / damage may give way in the next aftershock.
Given the temperatures, people will be forced into sheltering in buildings unlikely to be safe. Then it’s up to God (distribution of aftershocks and their strength.) Really nasty is a sequence like the New Madrid Earthquakes of 1811-1812.