CNN is following the latest out of central Arizona, where 19 firefighters were killed battling an out-of-control blaze. It is now the greatest loss of life for firefighters since 9/11.

Located near Phoenix, the Yarnell Hill fire has now grown to 6,000 acres and burned dozens of structures. Authorities believe it began with a lightning strike and is being fueled by extreme heat, drought conditions and gusty winds.

CNN's Kyung Lah is on the phone with more from Arizona.