Mesa County health officials have issued a health advisory due to high levels of smoke in the Grand Valley.
The county health department said Tuesday that the weather is contributing to the buildup of pollution from wood burning, vehicle exhaust and other sources.
Health officials are advising the very young, the elderly, those with heart disease and respiratory illnesses to limit their time outdoors. They also are urging residents to carpool and limit unnecessary trips, and open burning is restricted.
Health officials expect smoke levels to remain high until at least Thursday.