https://www.gamespot.com/articles/fortnite-season-5-launches-with-map-changes-new-sk/1100-6460345/

A major Fortnite update--v5.0--has been released, which means players that jump into game now will find a fresh crop of content to enjoy. This is all part of Fortnite Season 5, which introduces the All Terrain Kart, the Lazy Links and Paradise Palms locations, a new desert biome, skins, a Battle Pass, and more. It also adds in Rifts, which provide new adventures for players to take on.

Fortnite's servers went down on July 12 at 4 AM ET / 1 AM PT / 8 AM GMT so that Epic Games could conduct the necessary maintenance to roll out the update. The downtime lasted around an hour and 30 minutes, but the update is now playable, and there's plenty to check out. You can see the full Fortnite Season 5 patch notes here to read about what's different in the Battle Royale and Save The World modes.