Organic farmers and environmental groups sued the Agriculture Department on Monday over its scrubbing of references to climate change from its website.

The department had ordered staff to take down pages focused on climate change on Jan. 30, according to the suit, which was filed in the United States District Court for the Southern District of New York. Within hours, it said, information started disappearing.

That included websites containing data sets, interactive tools and funding information that farmers and researchers relied on for planning and adaptation projects, according to the lawsuit.

At the same time, the department also froze funding that had been promised to businesses and nonprofits through conservation and climate programs. The purge then “removed critical information about these programs from the public record, denying farmers access to resources they need to advocate for funds they are owed,” it said.

The Agriculture Department did not immediately respond to a request for comment.

The suit was filed by lawyers from Earthjustice, based in San Francisco, and the Knight First Amendment Institute at Columbia University, on behalf of the Northeast Organic Farming Association of New York, based in Binghamton; the Natural Resources Defense Council, based in New York; and the Environmental Working Group, based in Washington. The latter two groups relied on the department website for their research and advocacy, the lawsuit said.

Peter Lehner, a lawyer for Earthjustice, said the pages being purged were crucial for farmers facing risks linked to climate change, including heat waves, droughts, floods, extreme weather and wildfires. The websites had contained information about how to mitigate dangers and adopt new agricultural techniques and strategies. Long-term weather data and trends are valuable in the agriculture industry for planning, research and business strategy.