New York's Electric Zoo festival has been cut short due to storms.
The second day of Jay Z's Made in America festival in Philadelphia, Pennsylvania was also affected by severe weather conditions
Music fans were evacuated from the the Randall's Island event on Sunday (31Aug14) as extreme weather conditions threatened to cause havoc at the site.
Organisers have apologised to festival-goers, stating, "Ultimately our main concern is for the safety and security of all attendees, artists and staff".
Kaskade and Skrillex were all scheduled to headline the three-day event's final night when it was cancelled.
The second day of Jay Z's Made in America festival in Philadelphia, Pennsylvania was also affected by severe weather conditions.
Fans were asked to leave the site and find cover in "protected areas" late on Sunday afternoon, and after about an hour, gates were re-opened around 7.30pm local time.
As a result of the storm delay, the acts scheduled to perform the rest of the night were pushed back an hour, with the likes of Pharrell Williams, Tiesto, and Kings of Leon set to close out the two-day festival.
Kings of Leon star Nathan Followill, who is making his stage comeback after a tour bus accident derailed the band's North American tour, took to Twitter.com to pray for better weather, writing, "Dear thunderstorm, please go away so I can play some rock and or roll. So much for it always being sunny in Philadelphia".