HILL CITY, Kansas/CHICAGO/NEW YORK: Record-breaking temperatures spread to the eastern US from the Midwest on Wednesday, putting tens of millions of people under heat warnings expected to last into the July 4 holiday weekend, when Americans will celebrate the nation’s 250th anniversary.

Millions of Americans across the eastern half of the US are facing a prolonged stretch of dangerous and potentially record-breaking heat as Americans get set to head outdoors to…

Millions of Americans across the eastern half of the US are facing a prolonged stretch of dangerous heat that’s likely to break records as Americans get set to head outdoors to…