Organizers and city officials were expecting around 200,000 protesters in Washington on Saturday for the Women’s March on Washington. But the turnout surpassed all expectations as the demonstration grew into a more than a half-million–strong force that could turn out to be larger than the crowds that gathered for Donald Trump’s inauguration. The result of this much larger-than-expected crowd was evident to anyone who tried to join using any form of public transportation as trains and subways overflowed with people trying to make it into downtown Washington.

Washington’s metro system wrote on Twitter than 275,000 people had ridden the trains, noting that was eight times the normal volume for a Saturday. It also said that most parking was at or near capacity. That is quite the contrast from the tweets WMATA sent out on Friday during the inauguration, saying there was lots of parking available and how the number of riders was much lower than previous inaugurations.

Metro Ridership as of 11am: 275k. For comparison, that's more than 8x a normal Sat & even busier than most weekdays. #wmata #womensmarch — Metro (@wmata) January 21, 2017

Metro Ridership: As of 11am, 193k trips taken so far today. (11am 1/20/13 = 317k, 11am 1/20/09 = 513k, 11am 1/20/05 = 197k) #wmata — Metro (@wmata) January 20, 2017

And that’s just in Washington. Organizers say some 3 million people have and will gather around the world to take part in “sister marches.” In Chicago, for example, organizers canceled the march portion of the demonstration after the crowd grew to a much larger-than-expected 150,000 people. “Our march route is flooded. There is no safe way to march. We are just going to sing and dance and make our voices heard here,” rally and march co-chairwoman Ann Scholhmer told the crowd.

“It’s been a heartrending time to be both a woman and an immigrant in this country. Our dignity, our character, our rights have all been under attack and a platform of hate and division assumed power yesterday,” actress and activist America Ferrera told the crowd in Washington. “But the president is not America. His Cabinet is not America. Congress is not America. We are.”