Tuesday’s power outage caused by mylar balloon

About 4,700 people temporarily lost power on Tuesday.

Then a reader, Geoff, sent us this pic, saying:

I was on Valencia st when the power went out, so I went back home. On the way I saw this at 21st and Alabama. A Mylar balloon shorted out the wires, and it looks like it took out most of the district.

Thanks, Geoff!

The SF Appeal has the official story:

[PG&E spokesman] Molica said the balloon “caused extensive damage,” and he reminded people to keep metallic balloons weighed down and away from power lines.

Here’s a pic with the balloon highlighted, in case it wasn’t clear above.