100 degrees. that heat also a factor in these wildfires. here in colorado, you can see this wall of smoke has just turned the sky completely dark. more than 2,000 homes here are still evacuated, but with only 5% containment, this is going to be a long fire fight, tom. we can see all that haze there. all right, clayton, thank you. and we do move on now, we want to get to chief meteorologist ginger zee. she s at the george washington bridge. ginger, the big question tonight, just how much of a scorcher will it be for the fourth? reporter: thunderstorms have cut the heat and humidity around here, tom, but washington, d.c., baltimore, both had a heat index of 109 today. and you can see those excessive heat warnings that stretch across the nation, really from california to maine. and let s focus in on the holiday itself, on the fourth of july. the numbers are impressive and going to be sweltering, from 106 to boston back to st. louis at 102. and finally, not good for the fires. even h