D.C. Forecast: Start of a week-long heat wave

      This Afternoon:Mostly Sunny, Hot, & Humid Highs: 88-92 Wind: S 5-10 mph Tonight:Mostly Clear, Warm, & Muggy Lows: 68-76 Wind: SW 5-10 mph Monday:Mostly Sunny, Hot, & Humid Highs: 90-95 Heat Index: 95-100

      We've had a few short-lived heat waves this summer, but the longest yet is likely starting today.{} And while the highest temperature recorded to date has been 94, readings this coming week could sizzle as high as 97.{} Factoring in high dew point values that could send the heat index into the 100 degree range, dangerous conditions and thus the first Heat Advisories of the season are possible.{}

      With high pressure expected to dominate the region{}through next weekend, each{}of the coming days{}will aim for the 90s, feature mostly sunny skies, and promise only a slight chance of a{}shower to provide{}some cooling relief.{} The{}hottest days will{}likely be in the latter part of the week as downslope winds{}from the Appalachians drive the mercury up.{} Prepare to stay cool and safe this week as Mother Nature runs her fever!

      NOTE: The longest stretch of 90 degree{}days this year was the four-day period from May 29th through June 1st.{} The other two heat waves, both of 3 days duration, ran from June 24th through the 26th and July 5th through the 7th.{}