I don't have kids, but I do know that those fleece snowsuits that people are talking about would never keep a child warm in a truly cold climate - neither would blankets thrown over the child, for that matter. Everyone keeps their coat on (as well as gloves, and a scarf, and a winter hat!) in the car, not just kids. We do start heating our cars a few minutes before we need to leave, but we cannot realistically wait until it reaches an acceptable temperature, as that would take way too long! I understand the issue with carseats, but I have trouble seeing how people manage to keep young kids who are unable to regulate their own body temperature warm. As it is, I'd be more worried about my child getting dangerously cold than getting into a car accident. Thankfully I don't have kids yet, so I have plenty of time to find a solution that will take both issues into account
I am honestly asking, what would be a good way to keep your kids safe AND warm in their carseats? I've seen layering mentioned, but don't you still need to take off the top layers before strapping the child into their seat?