I asked one of the bridge officers. He says that there is a plan in place, if the need arises, we make shelters for them on the deck: they wouldn’t be allowed inside. He says that we have non-perishable stores (food and medicine) which are designated for this plan.
I think what Steamer says is true, but we aren’t politicians. We’re just people who have heartfelt and legal obligations to save lives. Snusmumriken is right, too: What else can we do?