July 17, 2012 10:32 am Oppressive Heat and High Humidity An Excessive Heat Warning will go into effect at 1 p.m. today and remain in effect until 6 a.m. Thursday. US & World Videos 2:50 One more cool day, then warmer weather ahead 3:15 Cold night, then a big warmup this weekend 3:05 Temperatures to heat up over the weekend 2:05 Warming into the 80s by weekend's end 2:09 Big weekend warm-up expected