The Rim Fire wildfire is burning on the edge of Yosemite now. It started west of Yosemite but exploded in size Thursday night to spread into the western edge of the park. Seems like something so far away from me, but I just read that it could directly affect us right here.

Yosemite is a couple hundred miles from us in San Francisco, but I was just reading that the fire is threatening both the electricity and water supply of San Francisco. The fire has already damaged power lines, prompting a shutdown of some lines but no blackouts so far.

And the fire is only 4 miles from Hetch Hetchy, which is the primary water source for San Francisco. Not sure exactly how it might affect the water quality, but it can't be good if the fire reaches the reservoir.

Anyway, it's been sort of a wake up call. It's not just big earthquakes that we have to worry about here in San Francisco and prep for.