最新报道:Record-breaking humidity and heatwaves hit 70 million East Coast Americans in June-July 2025, with 27 states enduring dangerous heat-dew point combinations. Dew points above 65°F surged since 1950, while "oppressive" 75°F+ days spiked in cities like Philadelphia and Washington. Climate warming enables air to hold 4% more moisture per degree, worsening heatwaves and nighttime temperatures. The extreme conditions strained energy grids, disrupted construction and agriculture, and increased heat-related illnesses. Scientists warn this signals a long-term climate shift, requiring infrastructure and emergency protocol overhauls for recurring extremes.