1. Not sure where you going with that. NYC hired the guy not because of a risk, but because of a reality
2. The Maldives already are becoming inundated. Again not risk, but reality.
1. "Not a risk, but a reality" seems to make no sense to me. Risk is a real thing. If you don't wear a seatbelt you are incurring risk. It doesn't mean you will die in a car crash but you are more likely two.
2. Inundated for drinking water, not submerged.