There were fire warnings out before the fire started. Conditions are still dry, unseasonably warm and windy. It doesn't take much. IIRC, there were fall fires in Boulder County in the fall a couple of years ago.
As for why it started: people are stupid. We were up in the mountains in July when they'd canceled fireworks and everything because the fire danger was so high, and heard from a bookstore owner up there that she'd come across people camping with a campfire. They claimed they didn't know there was a fire ban--never mind all those lighted signs saying FIRE BAN - EXTREME FIRE DANGER all over the county. She made them put it out, but was out walking her dog the next morning and they had one going again.
:banghead:
I would however, be willing to bet on some serial arsonists in the area....
It was reported Wednesday but the Littleton attempt happened on Monday (same day as the girl on Arvada reported someone following her on the way to school).
It could just be me, but something about the Littleton one seems off -- especially the part about trying to grab a 14-year-old boy. Maybe he was an especially small 14-year-old boy? It doesn't seem particularly similar to any of the Arvada attempted lurings. I'm also a bit surprised about the salt-and-pepper hair when his age is also described as 35-40. As I said, it seems a bit off. Maybe a bad copycat?