A building in Chapultepec has taken on a venomous façade, after a team of nine urban artists painted a giant snake curling down its side.

Marching with placards, banners, colorful hats and other political propaganda, more than 40,000 union members took to the streets of Guadalajara to mark Dia del Trabajo on May 1.

At a cost of seven million pesos, police in Guadalajara have been equipped with 25 motorized tricycles for patrolling the historic city center and Avenida Chapultepec.

The water ran red in several fountains across Guadalajara on Sunday, to symbolize the blood of those lost in the infamous sewer line explosions 20 years ago to the day.

Firefighters finally contained a wildfire that had burned for more than 100 hours in the Primavera Forest on the western outskirts of Guadalajara.

State authorities have not ordered a Phase One smog alert in Guadalajara even though "very bad" pollution has been recorded in the city over the past 24 hours.