It's been six months since a deadly collapse in a coastal Washington state community took 47 lives, and left the town of Oso, in Snohomish County, devastated.

But Washington state is dotted with landslide-prone slopes. An investigation by Seattle public station KUOW and the environmental news collaborative EarthFix has found that many local governments do much less than Snohomish County to keep people from building on dangerous ground.

KUOW's John Ryan has this report.