Paul Williams cools off in water while taking a break from yard work in Richardson, Texas, on July 31. AP

More than 70 million Americans sweated through the muggiest first two months of summer on record as climate change has noticeably dialed up the Eastern United States' humidity in recent decades, an Associated Press data analysis shows.

And that meant uncomfortably warm and potentially dangerous nights in many cities the last several weeks, the National Weather Service said.

Parts of 27 states and Washington, D.C., had a record amount of days that meteorologists call uncomfortable — with average daily dew points of 65 degrees Fahrenheit or higher — in June and July, according to data derived from the Copernicus Climate Service.

And that's just the daily average. In much of the Ea

See Full Page