"Rising Temperatures: Heat Warnings and Emergency Declarations Across the U.S."

A dangerous heat wave is scorching the south-central and western U.S., with over 113 million Americans under heat alerts stretching 2,000 miles from Oregon to Louisiana. Phoenix and Las Vegas could challenge all-time record highs as temperatures soar above 110 degrees. The planet also experienced its warmest June on record, attributed to a combination of human-caused climate warming and the strengthening El Niño climate pattern. Heat-related dangers include dehydration, heat exhaustion, and heatstroke, with extreme heat being the deadliest weather-related event in the U.S. Federal agencies report about 700 Americans die each year from extreme heat, and up to 20,000 deaths may have been linked to extreme heat from 2008 to 2017. Additionally, California faces wildfire concerns, while Europe braces for a heat wave named "Cerberus."