Nuit Infinie

Nuit Infinie ("infinite night") is a phenomenon brought up by the Juggernaut with an influence from the Chasm, in where the Earth was increasingly shrouded in darkness by large clouds. In the earlier years, the world was simply covered in large stratonimbus clouds, where in the final years before it was permanently ended by Victor Moore in 2095, the sky turned into pure darkness with the occasional black fog.

Origin
The origin of Nuit Infinie is unclear, but it's widely believed to be co-opted by the Chasm in an attempt to eat the world whole.