Carrington Event." Only it would be worse because Puerto Rico has the mainland United States nearby to assist.
I've thought of this many times since Maria but am so busy with more urgent things that I have not had time to write about it. We have no ability to forecast a Carrington Event other than a few hours of warning. Who knows that North Korea will do?
Here is a novel about such an event that I have read and find plausible. How would you protect yourself and your family if this happens?