(Bismarck, ND) -- Wildfires in the western part of the U.S. are causing hazy skies in North Dakota.
The state Department of Environmental Quality is advising people with respiratory conditions to consider limiting their time outdoors while smoky conditions continue. Small particles of ash and soot increased in the skies over the state Tuesday.
The Division of Air Quality says particulate matter can irritate the respiratory system, causing concerns for people with COPD, asthma, and allergies as well as young children and the elderly.
The hazing conditions are expected to last at least through the weekend.