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Arizona wildfires

^A home burns amidst the Yarnell Hill Fire in Yarnell, Ariz. on Sunday, June 30, 2013. The fire started Friday and picked up momentum as the area experienced high temperatures, low humidity and windy conditions. It has forced the evacuation of residents in the Peeples Valley area and in the town of Yarnell. (AP Photo/The Arizona Republic, Tom Story)

Arizona wildfire kills 19

A lightning-sparked fire in Yarnell, Arizona, overtook an elite group of firefighters on June 30, killing 19 members as they tried to protect themselves from the flames under fire-resistant shields. At last count, about 500 firefighters were on the scene, with more on

the way. The fire has burned 8,400 acres, or about 13 square miles, as a

heat wave across the Southwest sent temperature soaring.