Activists are petitioning the US government to formally classify extreme heat and wildfire smoke as major disasters, as soaring temperatures threaten to set records across much of the country.

In a petition filed with the Federal Emergency Management Agency, they seek to unlock new funding to help communities address such events before they strike, with money for air filters that strip out smoke and rooftop solar systems that can supply electricity when demand overwhelms power grids.

Climate change has made fatal heat waves more intense and frequent, while hotter, drier conditions stoke the risk of fires that can blanket the US in toxic smoke. An estimated 2,300 people in the US died from heat-related illness in 2023, the hottest year on record. And heavy smoke from wildfires in Canada last year traveled as far south as Georgia, prompting people to shelter inside and canceling flights in some of the largest US cities.