Spruce Grove-Morinville-Mayerthorpe-Evansburg
"Stagnant weather conditions under a ridge of high pressure are causing pollutants at the surface to build up with time. The air quality is expected to be at its worst this evening," it read.
"The poor air quality is expected to improve overnight.
"Individuals may experience symptoms such as increased coughing, throat irritation, headaches or shortness of breath. Children, seniors, and those with cardiovascular or lung disease, such as asthma, are especially at risk."
Those with lung diseases, such as asthma and COPD, can be particularly sensitive to air pollution.
"They will generally experience more serious health effects at lower levels. Pollution can aggravate their diseases, leading to increased medication use, doctor and emergency room visits, and hospital visits," read the statement.