The most ugrent concern is probably for homeless people.
Not for long. Temperatures like the ones you're having will "solve" the homeless problem in days, unless they've got proper winter gear, winter-rated sleeping bags and the skills to keep a fire burning...
Morbid, yes, but you guys should really get into housing-first for taking care of homelessness.
My pets are cold and miserable like us but I don't think they're in any danger of injury. They have thick coats and blankets which go pretty far inside.