That dark blue says both "I'm tough" and "don't move here."

It should be noted that many people are emphasizing that school closures are more about an area's infrastructure than it is whether their inhabitants possess the mental and physical fortitude to endure falling water crystals. This, of course, is something people in warm places say to help them sleep better in their comfortable, non-life-threatening air at night.

Created by redditor atrubetskoy for r/MapPorn, there are a few things the author would like us to keep in mind when reading this map:

Sources: redditor atrubetskoy