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Earlier quoted context omitted.
The few historical evacuations of >1mil people have often been over the course of 7+days, as well as over very large areas. The only _successful_ evacuation of a major metropolitan area (>3mil) in 20k causalities so it is hard to call that successful.
I beg to differ. Exodus of ~1m people in about one day is frequently observed in Europe. It can't be done with cars, of course, because cars are not a means of mass transportation. It can be done easily with trains, though. Example: Street Parade Zurich, attended by about a million people. Virtually all of those people arrive by train immediately before the event, and are gone the next day. Watching > 100k people pou…
Evacuation are very different from attending work, or attending a festival. Namely... You plan to return to your home/apartment/etc. and your belongs will still be present. There isn't the threat of death.
Furthermore Evacuations require moving people who often _don't_ have the ability to travel on their own. Rather by choice, or socio-economic pressures i.e.: poverty, or limited parking in city centers. Therefore attendance to work/events for these people is normally just walking a handful of blocks, or using public transit which become limited when dealing with evacuations.
This site makes an appearance on HN somewhat regularly, but in case it's new to anyone, it tends to be a pretty useful forecast visual for wind: https://www.windy.com/?25.820,-67.720,5
Discussion on their forums[0], most upset that these 'visualizers' are more fiction than fact. Also worth noting... getting wind speeds wrong can cost lives.
[0] https://community.windy.com/topic/4415/why-is-wind-speed-in-...