Open the air vent, or the port hole (which is just a hole), or open the door a crack, and can spend about two weeks in the bunker as long as you have water with you (which you should).
By then, hopefully someone has reported you missing and the rescue team will clear the fallen tree.
True, I was thinking about all the smoke in the air, but after some time the threat of smoke would go as the fire (at least should have) burnt passed to be safe to open vents.
Open the air vent, or the port hole (which is just a hole), or open the door a crack, and can spend about two weeks in the bunker as long as you have water with you (which you should).
By then, hopefully someone has reported you missing and the rescue team will clear the fallen tree.
True, I was thinking about all the smoke in the air, but after some time the threat of smoke would go as the fire (at least should have) burnt passed to be safe to open vents.