SEATTLE—Sir Mix-a-Lot has a couple of choice words for the folks out there in social media land calling Seattleites weather wimps. “Many here don’t have AC … dumb (expletive),” said the Seattle native who’s best known for his rap hit “Baby Got Back.” Justin Shaw is a little more diplomatic. The citizen forecaster behind the Seattle Weather Blog said he would politely invite the name-callers to spend a night or two in a Seattle house with no air conditioning. “Let them try to sleep in a 92 degree bedroom,” he said. “Then they can come talk to us and tell us how they feel.” Our buildings, our roads and our attitudes are not geared for severe heat. Why would they be? While more people in Seattle have air conditioners now than ever before, it remains the least air-conditioned metro in the nation with only 44 percent of homes with air …