The Atmospheric Monitoring System of Mexico City reported that the ozone levels reached up to 148 points in the metropolitan district of Álvaro Obregón.
At 4:00 p.m., the reported air quality in the city has been defined as "bad".
If the air quality reaches the 150 points of ozone, the Phase One Environmental Continency measures will be activated and people sensible to air pollution will be called to restrict their outdoor activities.