Nothings been announced yet. I don't believe Canadian telecoms do that for disasters outside of Canada much unless it's an especially catastrophic one but over 1200 people died in South Asia with over 40 million people displaced and nothing was done so I'd guess unlikely for Puerto Rico.
Koodo typically waives overage charges for customers displaced by disasters because if you've been evacuated from your home your cellphone may very well be your only point of contact. That is not the case here. Since you have not been evacuated, you are still at home, which means that there are numerous less expensive ways to reach displaced family members in Puerto Rico, including Skype and other VoIP services.
Absolutely I understand I haven't been displaced myself. I also understand there are normally other less expensive means of communications. However contact is near impossible with the entire Island being out of electricity which normally is needed to have an internet connection