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A car is submerged on a flooded road Tuesday, Feb. 21, 2017, in San Jose, Calif. Rains have saturated once-drought stricken California but have created chaos for residents hit hard by the storms. The latest downpours swelled waterways to flood levels and left about half the state under flood, wind and snow advisories. (AP Photo/Marcio Jose Sanchez)

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Bao Bao, the beloved 3-year-old panda at the National Zoo in Washington, enjoys a final morning in her bamboo-filled habitat before her one-way flight to China to join a panda breeding program, Tuesday, Feb. 21, 2017. (AP Photo/J. Scott Applewhite)

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Bao Bao, the beloved 3-year-old panda at the National Zoo in Washington, enjoys a final morning in her bamboo-filled habitat before her one-way flight to China to join a panda breeding program, Tuesday, Feb. 21, 2017. (AP Photo/J. Scott Applewhite)

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Bao Bao, the beloved 3-year-old panda at the National Zoo in Washington, enjoys a final morning in her bamboo-filled habitat before her one-way flight to China to join a panda breeding program, Tuesday, Feb. 21, 2017. (AP Photo/J. Scott Applewhite)

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Bao Bao, the beloved 3-year-old panda at the National Zoo in Washington, enjoys a final morning in her bamboo-filled habitat before her one-way flight to China to join a panda breeding program, Tuesday, Feb. 21, 2017. (AP Photo/J. Scott Applewhite)

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Bao Bao, the beloved 3-year-old panda at the National Zoo in Washington, enjoys a final morning in her bamboo-filled habitat before her one-way flight to China to join a panda breeding program, Tuesday, Feb. 21, 2017. (AP Photo/J. Scott Applewhite)

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Bao Bao, the beloved 3-year-old panda at the National Zoo in Washington, enjoys a final morning in her bamboo-filled habitat before her one-way flight to China to join a panda breeding program, Tuesday, Feb. 21, 2017. (AP Photo/J. Scott Applewhite)

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In this photo provided by the Russian Space Agency (Roscosmos) press service, a Soyuz-U booster rocket carrying the Progress MS-05 spacecraft blasts off from the Russian-leased Baikonur Cosmodrome in Kazakhstan Wednesday, Feb. 22, 2017. The unmanned Russian cargo ship lifted off successfully Wednesday on a supply mission to the International Space Station. (Russian Space Agency Roscosmos press service via AP)

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Vehicles make their way down the Mt. Rose Highway near Reno, Nev., Tuesday, Feb. 21, 2017. One of the strongest in a series of winter-long storms pummeled the Sierra Nevada with another 3 feet of snow on Tuesday, dumping triggering an avalanche that buried a major highway near Lake Tahoe in 20 feet of snow and dumping record-breaking rain on Reno for the second day in a row. (Jason Bean/The Reno Gazette-Journal via AP)

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A Nevada Department of Transportation snow removal vehicle clears the road on the Mt. Rose Highway near Reno, Nev., Tuesday, Feb. 21, 2017. One of the strongest in a series of winter-long storms pummeled the Sierra Nevada with another 3 feet of snow on Tuesday, dumping triggering an avalanche that buried a major highway near Lake Tahoe in 20 feet of snow and dumping record-breaking rain on Reno for the second day in a row. (Jason Bean/The Reno Gazette-Journal via AP)

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A Nevada Highway Patrol officer helps a stuck motorist on the Mt. Rose Highway near Reno, Nev., Tuesday, Feb. 21, 2017. One of the strongest in a series of winter-long storms pummeled the Sierra Nevada with another 3 feet of snow on Tuesday, dumping triggering an avalanche that buried a major highway near Lake Tahoe in 20 feet of snow and dumping record-breaking rain on Reno for the second day in a row. (Jason Bean/The Reno Gazette-Journal via AP)
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Sunrise over the Atlantic Ocean as seen from the Sanderling Resort, located on North Carolina's Outer Banks. (Eric Althoff/The Washington Times)

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Pittsburgh Penguins' Patric Hornqvist (72), of Sweden, falls to the ice while chasing the puck with Carolina Hurricanes' Viktor Stalberg (25), of Sweden, during the first period of an NHL hockey game in Raleigh, N.C., Tuesday, Feb. 21, 2017. (AP Photo/Gerry Broome)

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Flood waters inundate a recreation area Tuesday, Feb. 21, 2017, in Rio Linda, Calif. Water overflowing from nearby Dry Creek caused officials to call for a voluntary evacuation of parts of the small community north of Sacramento. (AP Photo/Rich Pedroncelli)

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Heavy storms over the past two weeks caused parts of the shoulder and one lane of westbound Highway 50 give way, Tuesday, Feb. 21, 2017, near Pollock Pines, Calif. Crews have one lane open, of the four lane highway, as they work to repair the hole that is about 40 feet long and 17 feet wide on one of the main routes to Lake Tahoe. (AP Photo/Rich Pedroncelli)

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New EPA Administrator Scott Pruitt invoked conservationist John Muir in his remarks Tuesday, which riled up the conservation lobby, who say Mr. Pruitt's track record shows him to be no friend to the environment. (Associated Press)

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Deb Wolf, a high school science instructional coach who helps teachers in Sioux Falls, S.D., schools write science curriculum, poses for a photo in Sioux Falls on Friday, Feb. 17, 2017. South Dakota legislators are weighing whether to let teachers decide how much skepticism to work into lessons on contentious scientific topics such as evolution and climate change. (AP Photo/James Nord)

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Ken Okenquist, center right, and his grandson Keaton Davis, 11, watch the flooding caused by Coyote Creek Tuesday, Feb. 21, 2017, in Morgan Hill, Calif. Rains have saturated once-drought stricken California but have created chaos for residents hit hard by the storms. The latest downpours swelled waterways to flood levels and left about half the state under flood, wind and snow advisories. (AP Photo/Marcio Jose Sanchez)