https://www.gamespot.com/articles/fortnite-servers-down-right-now-update-back-online/1100-6456647/

Update 2: Fortnite is back online, and the 2.4.2 update is now available. The new Crossbow weapon is now available in Battle Royale, among other things.

Update: Fortnite's servers are currently down to prepare for its upcoming update. We'll update when the game is back online. Original story follows.