In terms of flight operations and cancellations, Insel released this:
PUBLIC ANNOUNCEMENT: INSEL AIR COMMERCIAL FLIGHTS SUSPENDED UNTIL FURTHER NOTICE!!
SEE NOTICE BELOW FROM INSEL AIR FB PAGE
Update: Airport closure Sint Maarten for commercial flights
Due to Hurricanes Irma/Maria, all commercial flights in and out of Princess Juliana International Airport are currently suspended.
Until further notice, the airport is serving as a dedicated hub for emergency and evacuation flights only.