Guadalajara, Mexico - A massive blaze in Jalisco's Primavera Forest, which is located on the western edge of Guadalajara, has hundreds of emergency workers battling to get it under control.

According to the National Forestry Commission, the fire began early Saturday morning and has so far burned almost 3500 acres of the federally protected nature zone.

About 40% of the fire had been controlled by early Monday morning, and firefighters expect to have the blaze at a manageable level before the end of the day. Authorities have determined that burning trash in Colonia Arenales Tapatias started the blaze.

The fire is the most serious in the Primavera Forest since 2005, when a gigantic blaze consumed almost 20,000 acres and forced schools in the affected area to close for two days due to smoke levels.

So far, no sudden spike in the air quality index has been noted in Guadalajara and Education Secretary Antonio Gloria has said that school principals at campuses located near the blaze zone should determine whether to suspend classes.

Firefighters are working around the clock to contain the fire which is located in the Cerro Pelon, El Mirador, El Picnic, El Ocho y Medio, and Las Canoas zones of the forest.