It’s a third consecutive Spare the Air day for the Bay Area today and the 10th so far this summer. Unhealthy smog accumulations are impacting overall air quality as a mini heat wave continues through Thursday night. A high pressure system is blanketing the region and cutting off the influence of an onshore sea breeze. Inland valley highs will once again spike into the triple digits before dropping back into the 90s on Friday. Commuters can do their part by taking public transit and leaving the car at home.