The National Weather Service has warned of "searing heat and oppressive humidity that occurs during the 'dog days of summer'." ...

Multiple states are under extreme heat warnings, advisories or watches on July 23, according to the National Weather Service.

Death Valley is forecast to see heat index values peak at 101 Friday—swaths of the country are bracing for even warmer ...

Millions of Americans are under weather advisories this week. See which major cities have heat, flood or storm advisories.