Fourteen state attorneys general are pressing for extreme heat and wildfire smoke to be eligible for major disaster declarations, as dangerously high temperatures envelop eastern and central U.S. states.
The big picture: Heat alerts affected over 130 million people, as the National Weather Service warned of "widespread record high minimum temperatures" on Wednesday morning, stretching from the Lower Mississippi Valley, across the South, Southeast and along much of the East Coast.
Why it matters: The underground cavity that's at least 130 feet deep could be an ideal location for humans to build a base in which to stay, and researchers believe there could be hundreds more on the Moon.
