Some of those states which voted Trump for President in 2024 might now be regretting their choice as a heat dome is due to cover the eastern half of the US during the last week of July 2025, putting tens of millions of people in sweltering and dangerous conditions in states such as Florida and North and South Carolinas.

Up to 100 million people could be facing major or extreme heat risk. And while all logical people recognise the world faces a climate emergency, Trump says the US is facing a “national energy emergency” and has once again withdrawn the US from the Paris Climate Agreement. He has called climate change “mythical”, “nonexistent”, or “an expensive hoax”.

As people swelter and die in the heat, Trump’s Environmental Protection Agency (EPA) is trying to reverse the so-called “Endangerment Finding” which declared in 2009 that greenhouse gases are a threat to public health and welfare. They are trying to upend a foundational scientific determination about the harms of greenhouse gases that underpins the US government’s ability to curb climate change.

The government is expected to undo the earlier finding that greenhouse gases endanger public welfare.

It will argue that the economic costs of regulation have been undervalued — and downplay the role of US motor vehicle emissions in climate change.