via.q13fox.com
About 195 million people are under watches and warnings as the heat wave begins to reach peak temperatures
(CNN) -- Peak temperatures from a potentially deadly heat wave are expected to begin Friday, and major US cities are taking special measures to prepare -- with New York City declaring an emergency. Over the next few days, more than 85% of the lower 48's population will see temperatures above 90 degrees Fahrenheit, CNN meteorologist Dave Hennen said, and more than half will see temperatures higher than 95 degrees.