Temperatures will reach the mid-80s today and tomorrow in Berkeley — hardly a heatwave, but warmer than we’ve come to expect in recent weeks.

The rising barometer has triggered the first Spare the Air Day of the season today as the air quality is expected to deteriorate and some inland Bay Area spots are expected to hit triple digit temperatures, including Livermore which could peak at 105 degrees tomorrow.

Thankfully Berkeley will contain itself: after a possible 85 tomorrow, temperatures will start dropping on Wednesday (76) and be back to the familiar mid-60 range by the end of the week.

Update, 12.57pm: Tomorrow, Tuesday August 24, has also been declared a Spare the Air Day.

Photo: Dusk on Mt Tam from Berkeley waterfront by Dan Brekke/Berkeleyside Flickr pool.

Tracey Taylor is co-founder of Berkeleyside and co-founder and editorial director of Cityside, the nonprofit parent to Berkeleyside and The Oaklandside. Before launching Berkeleyside, Tracey wrote for...