Extreme Heat Scorches July Fourth Celebrations. How to Stay SafeExtreme Heat Scorches July Fourth Celebrations. How to Stay SafeExtreme Heat Scorches July Fourth Celebrations. How to Stay Safe 

USA TODAY Network / ReutersAn oppressive heat dome is bringing extremely hot temperatures to much of the United States on July Fourth – adding an ingredient of danger to traditional outdoor Independence Day festivities and America 250 celebrations. Several governors went onto social media warning residents ahead of temperatures expected to be 10 to 20 degrees above average across the eastern part of the U.S.