The patchwork system leaves some people unable to determine risks from smoke, including in rural areas where air quality can quickly degrade when fires ignite nearby.
PORTLAND, Ore. (AP) — People across the West struggled under acrid-yellowish green smog from raging wildfires that seeped into homes and businesses, sneaked into cars through air conditioning vents and caused the temporary closure of iconic locations such as Powell’s Books and the Oregon Zoo...