The wildfires feed on the explosive chapparal that covers the hillsides and ravines, and the Santa Ana winds blow the fires onto the homes which fools build adjacent to those areas. The rest of the Basin doesn’t possess vast expanses of combustible chapparal.
Then they shouldn't rebuild all the homes and yes, there should be a fire break here and there.
Put in a creek instead. If they can't do that, put a bunch of rocks there instead.