wednesday into thursday. it expands the high pressure that has been here over the four corners region, nevada, just drift a little bit, but that he dome stays massive, and it blocks wind and rain that could cool things off, and things are going to stay 10 or 15 degrees above average, that s fahrenheit, above average for the next week at least. take your hottest time of the year and add 10 to 15 degrees fahrenheit, and that is where we are. nearly every day this week in phoenix will be a record high. that is scary and what is even scarier are the lows. 94, 95, 94, those would be in the top 5 to 10 hottest nights phoenix has ever had. anyone of them, and you have seven in a row. it has been since last sunday, when the load dropped below 90.
midwestern storms reloading after a violent 24 hours. and new york city covered in haze for a second day. the aqi, that is 155. still very hazy. and that is unhealthy for everyone. reporter: the big apple taking the top spot for the world s worst air for a major city. and across the south, record-breaking temperatures again. and even higher heat indexes. west of dallas in colorado city, texas, residents there have been without water for nearly a week. our mireya villareal in fort worth where first responders are strained and worried. with this happeninger in the season and the response volume being crazy, we re prepared for the worst the rest of the summer. reporter: the dome, more severe storms. overnight, winds gusting to 100 miles an hour in the midwest. a wall of thunderstorms we call a derecho downing trees and knocking out power across hundreds of miles. whit: rob marciano, you re watching those severe storms.