The fall-out shelters are in a bad condition. The one at the hospital is unusable so Jake decides to take shelter in the mines. While wiring up explosives to collapse the entrance, he hears Emily on the radio.
Emily had an encounter with the escaped prisoners and in the resulting gunfight she is forced to kill one of them while Jake shoots the other one. They manage to get into the storm shelter just in time before the rains begin to fall.
Dale goes to the house of the girls he loves. She's a rich, spoilt brat who refused to go to the shelter, so he tries to save her. She does relent and even asks him to stay and they tape the windows againt the nuclear fall-out.
Hawkins hears morse code on the radio and the episode ends with him sticking pins in a map, presumably cities hit by a bomb.