Evacuations ordered as firefighters battle roughly 1,500-acre blaze along 91 Freeway in Anaheim

- A DC-10 flies over a burning hillside to make drop in the in the Santa Ana Mountains near Corona while battling the Canyon fire.

A helicopter makes a water drop in the Canyon fire.

Smoke billows from the Canyon fire buring the in the Santa Ana Mountains near Corona.

A firefighter is enveloped in smoke and embers while battling the Canyon fire in Corona.

Crews battle the Canyon fire as it closes in on homes in Corona.

A firefighter is enveloped in smoke as the Canyon fire burns in the hills surrounding a neighborhood in Corona.

A firefighting helicopter flies over a burning palm tree as it prepares to make a water drop on the Canyon fire in Corona.

Firefighters battle the Canyon fire as flames threaten a neighborhood in Corona on Monday evening.

Flames and embers swirl around a firefighter battling the Canyon fire in Corona on Monday evening.

Firefighters look on as the Canyon fire burns in the hills surrounding a neighborhood in Corona on Monday evening. The fire charred about 1,500 acres by Monday evening, triggering mandatory evacuations for more than a thousand residents near the Anaheim-Corona border along the 91 Freeway.

Against an orange sky, firefighters battle the Canyon fire as flames threaten a neighborhood in Corona on Monday evening.

A firefighter monitors the Canyon fire as it burns near homes in Corona on Monday evening.

Against a smoke-filled backdrop, a resident prepares to evacuate as flames from the Canyon fire burn in the hills surrounding a Corona neighborhood Monday evening.

The Canyon fire approaches a neighborhood in Corona on Monday evening.

Firefighters battle the Canyon fire as flames threaten a neighborhood in Corona on Monday evening.

Fast-moving flames from the Canyon fire threaten a neighborhood in Corona on Monday evening.

The Canyon fire lights up the hills in a Corona neighborhood Monday evening.

Flames and embers from the Canyon fire swirl around a neighborhood in Corona on Monday evening.

Traffic backs up along the 91 Freeway as the Canyon Fire burns in Corona on Monday.

Plumes of smoke billow into the Anaheim sky in a photo taken from neighboring Orange.