The Chicago Air & Water show was canceled Sunday because of poor visibility.
The show, which was delayed for more than three hours, began just after 1 p.m. with a rescue demonstration, but fog in the area prompted another delay in the show just after 2 p.m.
Officials initially paused the event in hopes that the fog would clear.
#ChiAirandWater has paused - hoping to restart as soon as the ceiling lifts.
— Chicago DCASE (@ChicagoDCASE) August 17, 2014
But Mary May, a spokeswoman for the Air & Water show, said the show was canceled just after 3 p.m.
"We're just not able to restart due to the fact that there's a low ceiling," May said. "We're not able to fly any planes."
The news was a big disappointment for the thousands of fans hoping to watch the show.
"We walked miles and miles and miles to get here and didn't get to see the show," one fan said.
Hundreds of thousands of spectators gathered along the lakefront Saturday to watch the show.
The 56th annual event featured dozens of aerial and water stunts by military and civilian teams that left crowds in awe.
With an initial budget of $88, the first show was held between Chicago Avenue and Lake Michigan in 1959 and featured a Coast Guard Air Sea Rescue, water skiers, a water ballet and a diving competition.