As much as giving to a charity that contributes to hurricane relief and such is a wonderful thing to do, remember that nothing helps a destitute man more than having a job to go to.
Our patronage is important to the recovery and stabilization of the region. Small family run hotels and restaurants in particular take a big hit as well as the working man employed by a resort that shuts down or lays off.
Reschedule if you can or wait and see what damage is done and consider your options before abandoning your vacation in The Yucatan. Cancelling may cost someone several weeks or months salary and money they need to support their home.
Just consider this, please and thank you.