Democratic lawmakers sounded off against the Trump administration's climate change and environmental policies on Saturday, as tens of thousands of protesters assembled in Washington for the People's Climate March.

Democrats in Congress have not hesitated to attack the administration for what many have deemed a blatant disregard for climate science and environmental regulations aimed at stemming the effects of global warming and climate change.

But the rally on Saturday, marked by potentially record-setting high temperatures in the nation's capital, offered Democrats an opportunity once again to take aim at President Trump.

"It shows you that we have a mobilized and organized effort to push back and fight President Trump's really hardline, extremist agenda," Rep. Debbie Wasserman Schultz (D-Fla.) said on CNN.

"The best news story of the first 100 days is how many people are organized against" President Trump says @DWStweets https://t.co/j0Q5rtaKDI — CNN Newsroom (@CNNnewsroom) April 29, 2017

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The march came a day after the Environmental Protection Agency announced that it would pull the plug on its websites containing information on climate change, in order to "reflect the views of the leadership of the agency."

EPA Administrator Scott Pruitt has voiced skepticism that human activity has caused shifts in the earth's climate, despite arguments to the contrary by an overwhelming majority of climate scientists.

Rep. Don Beyer (D-Va.) on Saturday denounced the EPA's decision to remove the climate change sites, calling it "a slap in the face to the world."

.@EPA pulls climate change from website to 'reflect the approach of new leadership."' #PeoplesClimateMarch



A slap in the face to the world https://t.co/ltCwvG8wNb — Rep. Don Beyer (@RepDonBeyer) April 29, 2017

As the climate march continued under sweltering heat, Democrats took to social media to applaud the effort:

Proud to see so many people standing against Trump's anti-EPA policies at today's #climatemarch. The time is now. https://t.co/V2x9WOzqy7 — Tom Suozzi (@RepTomSuozzi) April 29, 2017