Approximately two-thirds of the US population is feeling the heat as temperatures across much of the eastern half of the country reached the mid to high 90s on Saturday and are expected to remain there through the weekend.

The rising temperatures have put about 157 million people under heat warnings, watches and advisories.

People sunbathe at Pier 45 in New York on Saturday, July 20.
People sunbathe at Pier 45 in New York on Saturday, July 20.
Eduardo Munoz Alvarez/AP
Children cool down as they play in a public fountain in New York on July 19.
Children cool down as they play in a public fountain in New York on July 19.
Johannes Eisele/AFP/Getty Images
Whirl, an Amur tiger at the Brookfield Zoo, received an ice treat filled with chuck meat and bones, as zoo officials work to keep the animals cool, hydrated and fed on July 19 in Brookfield, Illinois.
Whirl, an Amur tiger at the Brookfield Zoo, received an ice treat filled with chuck meat and bones, as zoo officials work to keep the animals cool, hydrated and fed on July 19 in Brookfield, Illinois.
Kelly Tone/Chicago Zoological Society/AP
People rest in the shade at the Lincoln Memorial on the National Mall in Washington, DC, on July 19.
People rest in the shade at the Lincoln Memorial on the National Mall in Washington, DC, on July 19.
Alastair Pike/AFP/Getty Images
Marcus Rimson, 16, waits for the bus after work in Kalamazoo, Michigan, on Thursday, July 18.
Marcus Rimson, 16, waits for the bus after work in Kalamazoo, Michigan, on Thursday, July 18.
Emil Lippe/Kalamazoo Gazette/AP
Track security officer Patty Patterson carries a bag of ice on her shoulders as she walks back to her post during a NASCAR Cup Series auto race practice at New Hampshire Motor Speedway in Loudon, New Hampshire, on July 20.
Track security officer Patty Patterson carries a bag of ice on her shoulders as she walks back to her post during a NASCAR Cup Series auto race practice at New Hampshire Motor Speedway in Loudon, New Hampshire, on July 20.
Charles Krupa/AP
Vehicles drive over a buckled road, caused by the heat, on Interstate 229 under the Western Avenue bridge in Sioux Fall, South Dakota, on July 19.
Vehicles drive over a buckled road, caused by the heat, on Interstate 229 under the Western Avenue bridge in Sioux Fall, South Dakota, on July 19.
Makenzie Huber/Argus Leader/Imagn Content Services
People hold umbrellas to shade themselves from the sun on July 19, in New York.
People hold umbrellas to shade themselves from the sun on July 19, in New York.
Spencer Platt/Getty Images
A woman floats in a tube on the Comal River, in New Braunfels, Texas, on July 18.
A woman floats in a tube on the Comal River, in New Braunfels, Texas, on July 18.
Eric Gay/AP
Albert Tapia, 29, a foreman for PowerComm Construction, Inc., works at a construction site on 13th Street in Washington, DC, on July 18.
Albert Tapia, 29, a foreman for PowerComm Construction, Inc., works at a construction site on 13th Street in Washington, DC, on July 18.
Sarah L. Voisin/The Washington Post/Getty Images
Birds splash in a fountain on the Rose Kennedy Greenway in Boston, Massachusetts, on July 19.
Birds splash in a fountain on the Rose Kennedy Greenway in Boston, Massachusetts, on July 19.
Brian Snyder/Reuters
A man wipes his face with a towel while standing on subway platform in New York on July 20.
A man wipes his face with a towel while standing on subway platform in New York on July 20.
Jeenah Moon/Bloomberg/Getty Images