Sounds a silly thing to say, as the instinct is to put family first, but...
Don't forget about yourself in this, there are times when you will need to put yourself first
You are going to be exhausted emotionally and physically along with jet lag
No matter what happens from here on, make sure you take time to eat, sleep and get some down time, even if just a few minutes to walk and get some fresh air
I hope it is a relatively short crisis, but if you do not take care now, the you will make problems for yourself later