CHARLOTTE, N.C. -- A Code Orange Ozone advisory has been issued Friday for the Charlotte area by the North Carolina Department of Environmental Quality.

The advisory has been issued for ground level ozone for the Charlotte metropolitan area, in effect until 8 p.m. Friday.

So what does an Orange Ozone Forecast mean?

An air quality action day means that Ground Level Ozone concentrations within the region may approach or exceed unhealthy standards.

People who are active and anyone with respiratory difficulties should limit prolonged outdoor exertion. Specifically, these groups are encouraged to keep an eye out for nose, eye, throat and lung irritation.

Keep in mind, the high ozone levels can worsen existing conditions or make someone more susceptible to illness.