https://www.gamespot.com/articles/fortnites-rocket-launch-happened-and-cracks-have-a/1100-6460123/

Update: More rifts continue to appear in various areas across Fortnite. Most notably, a second enormous crack is now visible in the sky over the island, while another smaller rift also appears to be forming near Retail Row. We've added screenshots of these to the gallery below. The original story follows.

As teased, players who jumped into Fortnite: Battle Royale this past weekend got to witness a world-changing event: the launch of the Evil Lair's rocket, which resulted in a mysterious rift appearing in the sky over the island. It's unclear just what this strange development means for the future of the game, but it isn't the only consequence of the event, as additional rifts have also begun appearing in various portions of the map.