The Texas Commission on Environmental Quality declared an Ozone Action Day for the Dallas-Fort Worth region on Wednesday, May 13, 2026, as atmospheric conditions threaten to produce unhealthy levels of air pollution. National Weather Service officials in Fort Worth cautioned that the combination of sunshine and high temperatures would facilitate ground-level ozone formation.
Regional temperatures are forecast to reach a high of 89 degrees Fahrenheit during the day before settling at 68 degrees at night. While light 5 mph winds are expected, the National Weather Service alert noted that current conditions are conducive to high ozone concentrations across the metropolitan area.
Authorities provided specific guidance for residents to mitigate the environmental impact during the alert period. Citizens are encouraged to modify their daily routines to reduce emissions that contribute to smog.
“You can help prevent ozone pollution by sharing a ride, walking, riding a bicycle, taking your lunch to work, avoiding drive-through lanes, conserving energy and keeping your vehicle properly tuned,” the alert said.
Ground-level ozone serves as a significant respiratory irritant that differs from the protective ozone layer found in the upper atmosphere. According to the U.S. Environmental Protection Agency, this gas is composed of three oxygen atoms and can cause inflammation, airway damage, and breathing difficulties in vulnerable populations.
The EPA further noted that while urban centers are most susceptible to high ozone levels during hot, sunny periods, the pollutant can also be transported by wind to rural locations. Though common in summer, unhealthy levels can occasionally occur during colder months under specific conditions.
The extended forecast for North Texas indicates a warming trend with highs potentially reaching the 90s later in the week. While the work week remains dry, meteorologists at KXAS-TV (NBC5) indicate a 20 percent chance of precipitation by Sunday.