I freely translated that because my booklet is in German. But in my book it's at the beginning of page 3 so you can check for the exact wording.
But there are most likely alot of small villages scattered all over the area. Otherwise the charr wouldn't have burned such a huge area. And the fact that the burned-land is an almost perfect circle indicates that it was a more controled action than we thought.
By the way: Do we know what those chrystals are made of? Or are they just magical thingies?