What precisely is "risk"? I was, in my younger days, a member of a mountain rescue unit and we frequently did technical, high angle stuff which appeared to be "risky," but if you had your act together, was fairly safe. None of us felt we were at risk - we were trained and we adopted procedures which protected us and the victim(s).

Oddly enough, one of our members did perish prematurely- from Valley fever, most likely contracted while driving many miles over dusty dirt roads in southern Arizona during a particularly intricate practice session.

After all, life is risky.

I agree that people should evacuate in order that first responders can concentrate on combating the hazard rather than assisting people who should not have been there. That is an easy determination after the fact but difficult to predict in advance. I suppose there is a "macho" factor is standing one's ground, but it can be better to take an impromptu vacation with a friend or relative.