It was another summer weekend in America, complete with wildfires in California, flash floods in Connecticut and violent storms in Tennessee.

Yet even as climate change is hitting home for more and more Americans, the issue remains a relatively low priority for many. Global warming is just the 19th most important issue with voters, behind issues like improving roads and the budget deficit, according to the Yale Program on Climate Change Communication.

That isn’t stopping some Democrats from trying to make the issue central to the race for president.

Several climate groups this week launched a $55 million ad campaign to support Vice President Kamala Harris’s presidential bid. Last week, John Kerry, Jane Fonda, Bill Nye and Senator Ed Markey of Massachusetts joined a Zoom meeting called Climate Voters for Harris.

And on Monday, the Democratic National Convention opened in Chicago, with President Biden touting the success of the Inflation Reduction Act, which has unleashed billions of dollars in clean energy investments. “With your support, we passed the most significant climate law in the history of mankind,” he said.

Harris has yet to lay out a detailed climate policy as part of her presidential campaign. Nevertheless, climate-minded voters have flocked to support her.

As vice president, she cast the deciding vote to pass the Inflation Reduction Act. As a senator, she was one of the sponsors of the Green New Deal. As the attorney general of California, she took on big oil companies. That is enough to give her supporters confidence that, if elected, she will pursue an ambitious plan to reduce emissions and transition the country away from fossil fuels.