I got up this morning, and things looked foggy. And then as I got ready, it just got thicker.
When it was thick enough that the lights of the office building two lots over were just a glowing blur, I decided it would be better to drive to work rather than bike to BART.
And then of course once I got to through the tunnel, it's all clear with the sun lighting up the sky behind Mt. Diablo.
I'll just have to exercise this afternoon.