As millions of Americans prepare for another brutal heatwave, it’s now harder to find information about ways to stay cool while saving energy and keeping utility costs down.

At least 1,662 Department of Energy webpages offering guidance on protecting the electrical grid during heatwaves have gone dark as of 3 July, according to a Guardian analysis of a list of deleted URLs provided by researchers at the Internet Archive, a non-profit that hosts a repository of more than a trillion archived webpages.

These removals are just the latest example of a broader pattern: information that conflicts with the administration’s priorities – from data on queer and trans youth to online resources from the Consumer Financial Protection Bureau – is being removed from federal websites and surveys.

The energy department deletions coincide with the Trump administration’s latest push to undermine federal climate regulations. At least 18 webpages were removed within days of the proposed rollback to energy efficiency regulations for home appliances like air conditioners and heaters.

If enacted, the proposed rollback would effectively undo decades of policies that have been proven to lower household utility bills and make it much harder for the energy department to update efficiency standards for new appliances under future administrations, advocates say.