Luz Pratts, left, watches her daughters Karina, 11, Amarilys, 9, background, play with Laylana, 3, in an inflatable pool on the front porch as they keep cool in the West Kensington neighborhood of Philadelphia, Monday July 2, 2018. The National Weather Service has issued an excessive heat warning through Tuesday in the Philadelphia area with oppressive temperatures expect to last through the Fourth of July holiday. (Photo by Jacqueline Larma/AP Photo)





Flames from the County fire burn above Cache Creek Casino Resort on Saturday, June 30, 2018, in Capay, Calif. (Photo by Noah Berger/AP Photo)





An inflatable hockey player stands outside the site of the NHL hockey draft in Dallas, Friday, June 22, 2018. (Photo by Michael Ainsworth/AP Photo)





Two women with identical umbrellas walk under the sun in New York, New York, USA, 02 July 2018. Temperatures in New York City are expected to reach highs of 96 degrees fahrenheit (35.5 Celsius) as the east coast of US is experiencing a heat wave. (Photo by Alba Vigaray/EPA/EFE)





Deon Stewart and his daughter Semiyah, of New York, join other spectators as they watch a fireworks display on the east side of Manhattan, part of Independence Day festivities Wednesday, July 4, 2018, in New York. (Photo by Craig Ruttle/AP Photo)





Children play in a water fountain in Battery Park, in New York, New York, USA, 02 July 2018. Temperatures in New York City are expected to reach highs of 96 degrees fahrenheit (35.5 Celsius) as the east coast of US is experiencing a heat wave. (Photo by Alba Vigaray/EPA/EFE)





Firefighters wait for water as they battle flames at the Alpine Oaks Estates mobile home park during a wildfire Friday, July 6, 2018, in Alpine, Calif. Gusty winds fanned the flames as Southern California struggles through a scorching heat wave. (Photo by Eduardo Contreras/The San Diego Union-Tribune via AP Photo)





New Yorkers demonstrate against the Trump administration's decision to separate children from their parents when they are detained crossing the border, on June 14, 2018 in downtown Brooklyn, New York. (Photo by Andrew Lichtenstein/Corbis via Getty Images)





Lightning fills the sky as cowboys from the Rio Grande Valley set camp after arriving for Memorial Day weekend in Bandera, Texas, U.S. May 25, 2018. (Photo by Adrees Latif/Reuters)





People participate in a yoga class during an annual Solstice event in the Times Square in New York City, U.S., June 21, 2018. (Photo by Brendan McDermid/Reuters)





Children, with their faces covered with masks, leave the Cayuga Center, which provides foster care and other services to immigrant children separated from their families, in New York City, U.S., June 21, 2018. (Photo by Mike Segar/Reuters)





People stand on a fire escape as they watch the 2018 New York City Pride Parade in Manhattan, New York, U.S., June 24, 2018. (Photo by Andrew Kelly/Reuters)





EMT Trudy Bermudez and paramedic Tayreen Bonilla of New York City Fire Department get engaged at the annual Pride Parade on June 24, 2018 in New York City. The first gay pride parade in the U.S. was held in Central Park on June 28, 1970. (Photo by Kena Betancur/Getty Images)





A reveler performs as a float moves along Fifth Avenue during the New York City Pride Parade on Sunday, June 24, 2018, in New York. (Photo by Andres Kudacki/AP Photo)





People watch fireworks during the 4th of July Independence Day celebrations at the National Mall in Washington, U.S., July 4, 2018. (Photo by Toya Sarno Jordan/Reuters)





Heavy machinery and the American flag are seen before the arrival of U.S. President Donald Trump as he participates in the Foxconn Technology Group groundbreaking ceremony for its LCD manufacturing campus, in Mount Pleasant, Wisconsin, U.S., June 28, 2018. (Photo by Darren Hauck/Reuters)





U.S. President Donald Trump departs aboard Marine One after arriving from Bedminster, New Jersey at Joint Base Andrews, Maryland, U.S., July 1, 2018. (Photo by Eric Thayer/Reuters)





The statues of Jesus, Mary and Joseph are seen in a cage as a protest of child separation policy, in Indianapolis, Indiana, U.S., July 2, 2018 in this picture obtained from social media. (Photo by Christ Church Cathedral Indianapolis/via Reuters)





A man carries a bottle of water on a hot summer day in Central Park, Manhattan, New York on July 1, 2018. (Photo by Eduardo Munoz/Reuters)





A man drinks from a water fountain on a hot summer day in Central Park, Manhattan, New York on July 1, 2018. (Photo by Eduardo Munoz/Reuters)





Buena Ventura Martin-Godinez, right, stands with her daughter Janne after being reunited at Miami International Airport, Sunday, July 1, 2018, in Miami. Martin crossed the border into the United States from Mexico in May with her son, fleeing violence in Guatemala. Her husband crossed two weeks later with their 7-year-old daughter Janne. All were caught by the Border Patrol, and were separated. Her daughter was released Sunday from a child welfare agency in Michigan. (Photo by Lynne Sladky/AP Photo)





Kids run after calves during the Calf Scramble as part of the Beaver Creek Rodeo on Thursday, June 28, in Avon, Colo. (Photo by Chris Dillmann/Vail Daily via AP Photo)





People enjoy a hot afternoon at the Astoria Pool in the borough of Queens on July 2, 2018 in New York City. New York City and much of the East Coast is experiencing higher than normal temperatures with the heat index feeling over 100 degrees. The main pool at Astoria, the biggest in New York City and administered by the New York City Department of Parks and Recreation, sees over 3,000 people on a typical summer weekday. (Photo by Spencer Platt/Getty Images)





People eat, play cards and relax while waiting for the Fourth of July fireworks display to begin, in the Long Island City area of the Queens borough of New York on Wednesday, July 4, 2018. (Photo by Andres Kudacki/AP Photo)





A protester against the Trump administration's border policies tries to hold another protester back blocking a bus carrying migrant children out of a U.S. Customs and Border Protection Detention Center on June 23, 2018 in McAllen, Texas. Dozens of protesters blocked the bus from leaving the center resulting in scuffles with police and Border Patrol agents before the bus retreated back to the center. Before President Donald Trump signed an executive order Wednesday that halts the practice of separating families who were seeking asylum, over 2,300 immigrant children had been separated from their parents in the zero-tolerance policy for border crossers. (Photo by Spencer Platt/Getty Images)





In this Monday, June 18, 2018, photo, Mark Pickett, left, and Ryan Craig, right, work to rescue Bruce Salley, who was trapped in his car by flood waters in a supermarket parking in Rockford, Ill. An evening thunderstorm brought heavy rains across the Rock River Valley causing vehicles to get stuck in flood waters and stranding motorists. (Photo by Arturo Fernandez/Rockford Register Star via AP Photo)





Ten-time and defending Nathan's Famous Men's Champion Joey Chestnut poses with 72 hot dogs during Nathan's Famous International Fourth of July Hot Dog Eating Contest weigh-in at the Empire State Building on Tuesday, July 3, 2018, in New York. (Photo by Evan Agostini/Invision/AP Photo)





Leonard Hammonds II, of Penn Hills, right, points out that a Turtle Creek Police officer has his hand on his weapon during a rally in East Pittsburgh, Pa., on Wednesday, June 20, 2018, at a protest regarding the shooting death of Antwon Rose by an East Pittsburgh Police officer during a traffic stop the night before. (Photo by Steve Mellon/Pittsburgh Post-Gazette via AP Photo)





Yoga instructor Vee Gomez leads a beach yoga class on an overcast evening at Santa Monica beach in Santa Monica, California on June 21, 2018, to celebrate International Yoga Day, which is also the summer solstice. (Photo by Frederic J. Brown/AFP Photo)





Alexandria Ocasio-Cortez, center, the winner of the Democratic primary victory in New York's 14th Congressional District, hugs campaign volunteer Riley Roberts, Wednesday, June 27, 2018, in New York. Ocasio-Cortez, 28, upset U.S. Rep. Joe Crowley in Tuesday's election, Wednesday June 27, 2018, in New York. (Photo by Bebeto Matthews/AP Photo)





Wind created by Marine One taking off blows through the hair of visitors on the South Lawn as they watch the departure of US President Donald J. Trump, in Washington, DC, USA, 27 June 2018. Trump travels to Wisconsin, where he will stay overnight. (Photo by Michael Reynolds/EPA/EFE)