https://www.polygon.com/fortnite/2018/5/1/17306414/fortnite-season-4-v40-patch-notes-guide

After months of waiting, season 4 of Fortnite finally crash landed onto servers with patch v4.0 and made some massive changes to the game on its way in.

Thanks to the comet that we’ve been following for weeks, Fortnite Battle Royale’s map is in complete disarray now. Some locations have been destroyed completely and othersare simply in various states of ruin. While most players are going to notice changes to the map changes first, that’s not the only thing that’s been shifted by today’s patch on the Battle Royale side.