TULSA, OKLAHOMA -- Saturday, August 28 has been designated an Ozone Alert Day for the Tulsa area by the Oklahoma Department of Environmental Quality.
This is the fourth Ozone Alert Day of 2010.
The DEQ says persons with lung or heart disease should be aware that increased pollution may cause them to experience adverse health effects.
Ozone is formed when the gas nitrogen oxide combines with chemicals called volatile organic compounds. Hot and windless days usually create the perfect conditions for an Ozone Alert Day.