Force Majeur
Aside from meteor strikes and God his self making desires directly known, force majeure surely includes bad weather.
I appreciate bad weather is more mundane than a meteor strike, it's also rather more common.
We don't know why they needed to transport crew, but bad weather anywhere on their system could be a valid contracted reason to deplane passengers.
I agree what was written upstream. The method of removal is the issue here, not the fact of removal.