What happens to the existing grid when there are 2 consecutive weeks of bad weather during winter? Not sure where you are, but look at one of the availability

What happens to the existing grid when there are 2 consecutive weeks of bad weather during winter? Not sure where you are, but look at one of the availability maps at a NE utility (I know CT has one... CL&P?) after a major storm. Distributed generation definitely shouldn't be compared to "100% current availability"!