Shades of the summer of 2012, when a combination of forest fires and a heat wave kept air quality in the unhealthy zone for several days across the Treasure Valley?

Could be. The Idaho Department of Environmental Quality is issuing an orange or air alert for Sunday in Ada and Canyon Counties. An orange alert means conditions are unhealthy for sensitive groups like the elderly and those with respiratory issues, children and those who are active outdoors.

The forecast Air Quality Index (AQI) is 105 for fine particulate matter due to continued inversion conditions.

Air is considered unhealthy for certain groups when particulate matter reaches a level of 101 and higher.

All open outdoor burning is prohibited.

Here are some other tips: Consider postponing strenuous activities until air quality improves, limit driving, combine trips and errands, avoid woodstove and fireplace use if possible.

For more information concerning general air quality, the air quality index and forecasts, and local open burning ordinances, please visit the Idaho Department of Environmental Quality's website at http://www.deq.idaho.gov/daily-air-quality-reports-forecasts