The Texas Commission on Environmental Quality says ozone levels Friday could reach level purple, or "very unhealthy," in the Houston and Dallas-Fort Worth areas and level orange, for "unhealthy for sensitive groups" in much of the rest of the state.
The high levels are due to forecasts of extremely high temperatures, lots of sunshine and very low winds. The heat indices were very high too. The temperatures were all in the 100s with the warmest at Corpus Christi with 115 degrees and 111 degrees at Angleton.
The Environmental Protection Agency says purple ozone levels can cause severe respiratory symptoms and impaired breathing for people in sensitive groups. Everyone else should limit outdoor exertion.