The Twilight Zone - The Midnight Sun torrent

In a world that is getting ever nearer to the sun, people are trying to find ways to deal with the extreme heat. Most people have gone north with Norma and Mrs. Bronson the only two people left in their apartment building. There is little or no infrastructure remaining and water is one commodity that is very much in demand. They panic when an intruder breaks into Norma's apartment and holds them, at least for a few moments, at gunpoint. All is not as it seems however