In honor of President Trump's 100th day in office, thousands of marchers banded together across the U.S. to demand action on climate change, according to the Associated Press. At the marquee event, the People's Climate March in Washington, D.C., thousands of demonstrators braved the sweltering, record-breaking heat to protest near the White House as well as Trump's International Hotel downtown.
Organizers estimated that about 300 sister marches or rallies were taking place across the country, including Seattle, Boston, and San Francisco.
WATCH | An aerial view of the People's Climate March in the Nation's Capital.
Participants cited Trump's rollback of restrictions on mining, oil drilling, and greenhouse gas emissions as reasons for their cause. In the past, Trump has referred to climate change as a "hoax." And, on Friday, the Environmental Protection Agency scrapped climate change from its website.
WATCH | Circa was on-the-ground at the People's Climate March for a closer look.
And it wasn't just everyday people who took to the streets on Saturday. Environmental activist Leonardo DiCaprio marched in solidarity with those in Washington.
Other high-profile appearances included Vermont Sen. Bernie Sanders at a Montpelier rally. And, former vice president and author of "An Inconvenient Truth" also took at stand in D.C. despite the heat.