Make an educated & informed guess, yours is as good as mine, as otherwise - we would run UA or other carrier's command center for ops.
If your plans are flexible & you can fly out a day earlier - before everyone else scrambled, I would consider that a wise move if in a similar situation - with or without waivers, depending on how important it is for reaching your destination abroad.
It's now a Cat-4 hurricane with further strengthening over next 24 years & coming up the east coast - the threats & damages from urban/flash flooding and heavy rain will do enough to cause major headaches ... reaching EWR could be a challenge by itself unless one has a Humvee on standby. NJ Transit & rails haven't been reliable in previous storms and I don't see good reasons to be confident of their crisis management - even MTA/NYC Transit somewhat admitted that they aren't quite recovered & prepared for the next big one, i.e. Lower Manhattan stations below ground level ...