An unrelenting electrical storm pounds the wasteland for three straight days. Survivalists scavenge wreckage for roofing materials and gutters to stave off flooding. Barely protected inside a junked car, Alexa's challenge is at risk due to hypothermia.

Wes and Stee brave croc-filled waters to build a fish dam and get their first catch of the challenge. Teal and Waz use a mosquito net to catch six terrapins. A heat wave has both Frank and Joe on the brink as medics assess if they can continue.