We always fly through Beef Island, haven't had an issue. We generally avoid weekends, but my niece left on the early flight two weeks ago today, no problem. We would definitely consider a $1k voucher offer. Our house would still be open, and that would be another trip paid for!
Planes are taking off to the west today, so they may be weight restricted. One option would be to ask American to pay for a flight to San Juan and get you home from there.
You may have seen the photos of STT yesterday - the TSA line wound several blocks outside the terminal. Not for me!