Photography

Scenes during a historic heat wave in the western U.S.

More than 40 million Americans are in the crosshairs of triple-digit heat this week, with some spots soaring over 120 degrees as records fall across the West. The heat in many areas is dangerous, prompting excessive-heat warnings in seven states where temperatures will be hazardous to human health.

Ronda Churchill/AFP/Getty Images

June 16 | Las Vegas

John Merizier of Salt Lake City stops along the Strip to stand in a water mister during an excessive-heat warning.

Ronda Churchill/AFP/Getty Images

Ronda Churchill/AFP/Getty Images

June 16 | Las Vegas

A person drinks cold water at the Courtyard, a homeless resource center.

Bridget Bennett/Bloomberg News

Bridget Bennett/Bloomberg News

June 16 | Las Vegas

People walk past misters along the Strip.

Bridget Bennett/Bloomberg News

Bridget Bennett/Bloomberg News

June 16 | Las Vegas

Emily D. takes a taste from a frozen drink.

Ronda Churchill/AFP/Getty Images

Ronda Churchill/AFP/Getty Images

June 16 | Las Vegas

Children play in sprinklers at a park.

Bridget Bennett/Bloomberg News

Bridget Bennett/Bloomberg News

June 16 | Las Vegas

People receive a cooling spray of water at the Circa hotel's pool.

Ronda Churchill/AFP/Getty Images

Ronda Churchill/AFP/Getty Images

June 16 | Las Vegas

Lifeguard Mateo Bautista receives a cooling spray of water from EMT and security officer Angie Sanchez at the Circa hotel pool.

Ronda Churchill/AFP/Getty Images

Ronda Churchill/AFP/Getty Images

June 16 | Houston

A runner cools off under an outdoor shower.

Zach Chambers/Bloomberg

Zach Chambers/Bloomberg

June 16 | Healdsburg, Calif.

Gerry Huddleston of Santa Rosa, Calif., cools off in the Russian River at Healdsburg Veterans Memorial Beach.

Kent Porter/Press Democrat/AP

Kent Porter/Press Democrat/AP

June 16 | Nicasio, Calif.

A tire is wedged between cracks in dry earth at Nicasio Reservoir in Marin County, which is under mandatory water-use restrictions.

Justin Sullivan/Getty Images

Justin Sullivan/Getty Images

June 15 | Phoenix

Tobias Deardorff, left, and David Vanoni put on sunscreen before passing out water and ice pops to the homeless.

Caitlin O'Hara/Getty Images

Caitlin O'Hara/Getty Images

June 15 | Phoenix, Ariz.

Tim Smith, right, and Adrian Keller fill a cooler with water at a heat relief station at the Salvation Army Phoenix Citadel.

Caitlin O'Hara/Getty Images

Caitlin O'Hara/Getty Images