NEW : No break from the heat wave , says the National Weather Service . The National Weather Service declared excessive heat on Sunday for 14 states . ( CNN ) -- High humidity has messed up heat indices , making it feel as hot as 126 degrees . The extreme heat is forecast to move east by week 's end , affecting the East Coast .
NEW : No break from the heat wave , says the National Weather Service . The National Weather Service declared excessive heat on Sunday for 14 states . High humidity has messed up heat indices , making it feel as hot as 126 degrees . The extreme heat is forecast to move east by week 's end , affecting the East Coast .