 And today, before the storms arrive, it is muggy out there. Temperature is on the way up to 94 with the heat index around 100 degrees. But tomorrow, again, much cooler and heat index values will be in the upper 70s. 82 now in Arlington, 80 in Tysons, and 81 in Woodbridge. Brought to you by Lend the Plumber Heating and Air. Trusted same-day service, seven days a week. Coming up on WTOP.