Minutes after the team's victory, fans began hopping over several layers of barricades outside the field to celebrate the once-in-a-lifetime moment of their team advancing to the World Series.
Police helicopters were seen overhead as Clark Street filled with people from Sheffield Avenue to Addison Street.
Video of the scene from Sky 5 showed the crowd swaying back and forth.
Chants of "Go, Cubs, go" were heard in the streets as fans wept, hugged and cheered.
Police eventually opened the barricades to allow all fans to gather around the park.
For the first time since 1945, the Cubs are headed to the World Series as they beat the Los Angeles Dodgers.
Kyle Hendricks allowed a lead-off single to Andrew Toles to start the game, but he was quickly erased on another stellar defensive play by Javier Baez. Corey Seager hit a soft grounder to the Cubs' second baseman, and he started a 4-3 double play to get the Cubs out of trouble.
Outside Wrigley Field, the City of Chicago's Office Emergency Management & Communications announced just before 8 p.m. that because of the crowd size, no additional pedestrians would be allowed on Clark Street between Newport and Addison.