Sounds like the storm maintained a strong Cat4 the entire time it passed over Puerto Rico, pretty much as bad as it could get. I just read that the island is 100% without power. Combined with emergency response organizations already stretched thin by two other storms, this looks bad.
I know 3 people that live there, 2 from College that I have lost contact with, and one who happens to also be an IAP member (vallealbert) whom I have purchased many blanks from on eBay. I know a lot of you know Alexander as well. I think he is in San German, which looks like might have fared better than other locations. I'm hoping all three made it through the storm safe. Unfortunately, I think it might be quite some time before the communications are properly restored.