The story
scorch (as in scorcher, scorching) + pseudo-Romance suffix -io (see for example, Italian -io, Portuguese -io, Spanish -iego, or possibly Greek -ιος (-ios)). Coined for The Fast Show, a BBC comedy series, in the "Chanel 9 News" sketch: the TV news in a fictional Mediterranean country delivered in gibberish combining Romance and Greek-sounding words supposed to be the local language. The weather map was always very hot and sunny, described as "scorchio".
Etymology from Wiktionary, CC BY-SA 4.0.