The United States is experiencing scorching new levels of heat fueled by climate change this summer, with dozens of people dying in the West, millions sweating under heat advisories and nearly three-quarters of Americans saying the government must prioritize global warming.

But as the Republican Party opens its national convention in Milwaukee with a prime-time focus on energy on Monday night, the party has no plan to address climate change.

While many Republicans no longer deny the overwhelming scientific consensus that the planet is warming, party leaders do not see it as a problem that needs to be addressed.

“I don’t know that there is a Republican approach to climate change as an organizing issue,” said Thomas J. Pyle, president of the American Energy Alliance, a conservative research group focused on energy. “I don’t think President Trump sees reducing greenhouse gases, using the government to do so, as an imperative.”

When former President Donald J. Trump mentions climate change at all, it is mockingly.

“Can you imagine, this guy says global warming is the greatest threat to our country?” Mr. Trump said, referring to President Biden as he addressed a rally in Chesapeake, Va., last month, the hottest June in recorded history across the globe. “Global warming is fine. In fact, I heard it was going to be very warm today. It’s fine.”

He went on to dismiss the scientific evidence that melting ice sheets in Antarctica and Greenland are causing seas to rise, threatening coastal communities around the world. He said it would result in “more waterfront property, if you’re lucky enough to own.” And he lapsed into familiar rants against windmills and electric vehicles.