Thousands of people in cars and on foot blocked traffic for several hours and streets were cleared up across downtown early Saturday morning.
Celebrations lasted until the early morning hours, with huge crowds of people taking over the streets and blocking traffic throughout the Loop.
Meanwhile, the city's Office of Emergency Management and Communication is urging residents to use caution through the weekend.
«The City of Chicago encourages residents to celebrate safely and responsibly,» OEMC said. «Expect increased traffic due to celebratory activities through Sept. 18.»