Three firefighters have died battling fierce blazes along the Utah-Colorado border, driven by high temperatures, strong winds and low humidity. Dangerous weather conditions are compounding a fire season made worse by historically low snowpack, with more than a dozen blazes burning across hundreds of thousands of acres in the two states. Five firefighters were trapped in a fire over the weekend, with three losing their lives and two others treated for burn injuries, the US Wildland Fire Service said in a statement. "Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday," the National Weather Service said in an update. Utah Governor Spencer J. Cox announced a ban on fireworks during the upcoming July 4 Independence Day holiday, while Colorado Governor Jared Polis declared a state of emergency to support fire response efforts. Human-caused climate change is driving longer fire seasons and more intense blazes, as rising temperatures and increasingly arid conditions create landscapes primed to burn.