Roads in Glendale began opening up Sunday morning, more than 12 hours after a fire closed a section of Grand Avenue.

A portion of Grand Avenue was reopened about 10 a.m. Sunday after being closed Saturday night due to the fire at a recycling yard near 62^nd and Myrtle avenues, officials said.

The Maricopa County and Arizona departments of transportation closed several major roads and streets to allow firefighters to battle the blaze that Glendale Assistant Fire Chief Ken Barnes called "massive."

Glendale firefighters remained at the scene througout the morning "mopping up hot spots," according to the department.

A front loader was brought in to help move debris for improved access, firefighters said.

The Glendale Fire Department used its social media sites to thank the city's police department for its work in helping fight the fire.

"Their drone helped us locate and extinguish hidden hot spots, saving water and reducing environmental impact," according to the sites.