Dream of phone

My dream was about some sort of plague or apocalpyse that had changed society as we know it. I can remember 4 parts of the dream 1. My group is staying in an abandoned house. I have a small backpack of stuff, and I'm packing it up while talking with other people in my group 2. My group is at a large cave. I see a little kid try to commit suicide by drinking detergent. This is the second time he's tried to do this. I stop him before he swallows more than a mouthful. I go out of the cave and see the group's doctor sitting at a white folding table. She is talking to a girl about how just because there's a lot of sickness doesn't mean she can give out free tissues. I ask the doctor whether I need to do anything else for the boy, and she says no. 3. I'm at a sandstone river gorge on the banks of a river that rushes over big rocks. I am talking with my little sister on the phone, and she says that her group cannot find much water and is rationing what they have and going thirsty. 4. I am in a car with my sister, who has joined my group. We are on a steep mountain road in the dark - maybe the Sawteeth at Yellowstone. A group of motor cycles pass by - only one motorcycle has working lights. I say that in the darkness, a motorcycle could be mistaken for a monster and shot.