A helicopter makes a water drop on a hillside after a wildfire broke out in the Brentwood area of Los Angeles, Sunday, May 28, 2017. A dark plume of smoke was visible for miles as the fire consumed moderate to thick brush near Mandeville Canyon Road, a dead end road that snakes up a deep canyon lined by expensive view homes. A few residents voluntarily left but no homes were damaged. (AP Photo/Brian Melley)

A helicopter makes a water drop on a hillside after a wildfire broke out in the Brentwood area of Los Angeles, Sunday, May 28, 2017. A dark plume of smoke was visible for miles as the fire consumed moderate to thick brush near Mandeville Canyon Road, a dead end road that snakes up a deep canyon lined by expensive view homes. A few residents voluntarily left but no homes were damaged. (AP Photo/Brian Melley)

Firefighters, lower right, work to contain a wildfire that broke out in the Brentwood area of Los Angeles, Sunday, May 28, 2017. A dark plume of smoke was visible for miles as the fire consumed moderate to thick brush near Mandeville Canyon Road, a dead end road that snakes up a deep canyon lined by expensive view homes. A few residents voluntarily left but no homes were damaged. (AP Photo/Brian Melley)