The city offered free subway and bus rides to coax people from their vehicles.
Exposure to air pollution for just a month or two may still be enough to increase the risk of developing diabetes, especially for obese people.
Environment Secretary Alejandro Pacchiano said if conditions don't improve, further measures may be considered such as suspending industrial activity at factories.
While conditions persisted, residents were better off inside between 1 p.m. and 7 p.m., should refrain from vigorous exercise in the open and curb sporting activities to avoid respiratory problems.
Mick Jagger made a joke about Sean Penn at the beginning of the concert.
Cleofas is considered the second in command of the gang behind the wave of violence in Reynosa.
Vehicular traffic will be restricted due to extreme pollution.
Tickets go on sale on Wednesday and sales will be limited to 2 tickets per buyer.
The minor, just about three-years-old, has a bullet wound in the skull.
Baja California, Tamaulipas, Michoacán, Nuevo León, Chihuahua, Mexico City, Chiapas and Jalisco are the states where more arrests have been made.