Colds can get worse if you don't take care of them. I've talked to a lot of dead people who died from easily cured illnesses. [Mostly people from countries where treatment for those illnesses was out of their hands, or the very poor and homeless. He would sometimes help Thanatos guide whole handfuls of children down into the Underworld.]
I hadn't really thought about a tent. It wasn't really cold last night, so I figured it would be fine tonight too. They've got to be done with the rain for a while, right?