"Apocalyptic language" refers to words or phrases that describe, predict or depict a catastrophic event or the end of the world. It is used to emphasize the severity or importance of something. Full definition
Revelation 20:7 - 10 is indebted to these chapters, which are oracles in apocalyptic language. (religion-online.org)
That said, and regarding «AIT», much as I admire Al Gore's sentiment, I think the use of exaggeration and apocalyptic language actually works * against * the clarity of the climate science, such as it stands at present, rather than promoting clarity. (realclimate.org)
Small wonder he has been using apocalyptic language in trying to stop the Corbyn bandwagon. (politics.co.uk)