https://www.gamespot.com/articles/fortnite-ps4-patch-coming-soon-heres-what-it-does/1100-6457909/

Fortnite is getting a new patch on PlayStation 4--but it's not a big, feature-rich update. Instead, this patch will fix an unspecified crash issue occurring on Sony's platform.

The patch will be released at midnight Pacific tonight, which is 3 AM Eastern. Thankfully, the servers are staying up as the patch is released; there will be no downtime.