South Wales was a region of Wales. When the Daleks transported Earth (along with 26 other planets) to the Medusa Cascade, it caused an earthquake-like effect on the entire planet. In the Torchwood Hub, Gwen Cooper stated that the whole of South Wales must have felt that, but Ianto Jones discovered the true extent, remarking, "Little bit bigger than South Wales..." (TV: The Stolen Earth) Blon Fel-Fotch Passameer-Day Slitheen noted that the entire South Wales coast would fall into the sea and no-one would notice. (TV: Boom Town)

In the 2010s, South Wales was targeted by a tsunami caused by the Committee, who manipulated Norton Folgate and Yvonne Hartman from Pete's World. Tyler Steele managed to convince Yvonne to try to stop the crisis, which she managed to do for Newport but not for Cardiff. (AUDIO: Eye of the Storm)

South Wales Mail was a South Wales newspaper. (TV: Out of Time)

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