SAT Rescheduled

What happens if there is a blizzard or tornado or power outage or something of that nature and SAT is cancelled and rescheduled for an inconvenient day? Anyone ever faced this situation? How much did you score? Did you keep up with the prep?

This happened January 2016 for me. There was a blizzard that hit NY (and surrounding regions) that caused pretty much every test center to close. I used the extra weeks to study a bit more.