Meteorologists predict a sweltering summer for the United States, possibly ranking among the hottest on record. The transition from a weakening El Niño to a strong La Niña in the Pacific is believed to be the culprit behind the extreme heat. Temperatures are expected to soar as early as May, with the peak of the heatwave hitting in August. Regions such as Texas, New Mexico, Kansas, and Minnesota are expected to bear the brunt of the heat, while Southern California and Arizona will initially experience cooler temperatures.