Environment

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This photo taken Monday, Feb. 13, 2017, shows erosion caused when overflow water cascaded down the emergency spillway, right, of the Oroville Dam in Oroville, Calif. Water flowed over the emergency spillway Sunday morning when Lake Oroville reached capacity, and engineers determined the hillside was eroding faster then expected, undermining the concrete wall. Officials fearing it was about to collapse ordered thousands of residents downstream to evacuate. (AP Photo/Rich Pedroncelli)

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This photo taken Monday, Feb. 13, 2017, shows erosion caused when overflow water cascaded down the emergency spillway, right, of the Oroville Dam in Oroville, Calif. Water flowed over the emergency spillway Sunday morning when Lake Oroville reached capacity, and engineers determined the hillside was eroding faster then expected, undermining the concrete wall. Officials fearing it was about to collapse ordered thousands of residents downstream to evacuate. (AP Photo/Rich Pedroncelli)

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In this Tuesday, Feb. 14, 2017, satellite image released by DigitalGlobe and taken by DigitalGlobe's WorldView-4 satellite shows an overview of the Oroville Dam in Oroville, Calif. On Sunday, Feb. 12, 2017, thousands of people were evacuated from counties downstream of the nation's tallest dam amid concerns the spillway could fail and send water roaring downstream. (©2017 DigitalGlobe via AP)

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In this Aug. 23, 2016, satellite image released by DigitalGlobe and taken by DigitalGlobe's WorldView-2 satellite shows an overview of the Oroville Dam in Oroville, Calif. On Sunday, Feb. 12, 2017, thousands of people were evacuated from counties downstream of the nation's tallest dam amid concerns the spillway could fail and send water roaring downstream. (©2017 DigitalGlobe via AP)

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FILE - In this Jan. 18, 2017, file photo,Environmental Protection Agency Administrator nominee, Oklahoma Attorney General Scott Pruitt testifies on Capitol Hill in Washington at his confirmation hearing before the Senate Environment and Public Works Committee. Senate Republicans are poised to use their majority to confirm Pruitt to lead the Environmental Protection Agency, despite calls from Democrats for a delay.(AP Photo/J. Scott Applewhite, File)

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Environmental Protection Agency Administrator nominee, Oklahoma Attorney General Scott Pruitt testifies on Capitol Hill in Washington at his confirmation hearing before the Senate Environment and Public Works Committee, in this Jan. 18, 2017, file photo. (AP Photo/J. Scott Applewhite, File)

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This photo taken Monday, Feb. 13, 2017, shows erosion caused when overflow water cascaded down the emergency spillway, right, of the Oroville Dam in Oroville, Calif. Water flowed over the emergency spillway Sunday morning when Lake Oroville reached capacity, and engineers determined the hillside was eroding faster then expected, undermining the concrete wall. Officials fearing it was about to collapse ordered thousands of residents downstream to evacuate. (AP Photo/Rich Pedroncelli)

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Alaska Gov. Bill Walker holds a news conference on Thursday, Feb. 16, 2017, in Juneau, Alaska, that focused on the state's response to widespread opioid abuse. Walker this week issued a public health disaster declaration stemming from the abuse of opioids in Alaska. (AP Photo/Becky Bohrer)

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Alaska state medical officer Jay Butler addresses reporters during a news conference on Thursday, Feb. 16, 2017, in Juneau, Alaska, that focused on the state's response to widespread opioid abuse. Gov. Bill Walker this week issued a public health disaster declaration stemming from the abuse of opioids in Alaska. (AP Photo/Becky Bohrer)

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Alaska Gov. Bill Walker signs an administrative order outlining measures aimed at combating opioid abuse in Alaska on Thursday, Feb. 16, 2017, in Juneau, Alaska. Walker this week issued a public health disaster declaration stemming from the abuse of opioids in Alaska. (AP Photo/Becky Bohrer)

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The burned remains of vehicles parked near the Royal Suite Lodge in Anchorage, Alaska, are shown Wednesday, Feb. 15, 2017, after a deadly fire. The fire's cause is under investigation.. (AP Photo/Mark Thiessen)

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The burned remains of the Royal Suite Lodge in Anchorage, Alaska, are shown Wednesday, Feb. 15, 2017, after an early morning fire. Officials said several were injured in the deadly fire. The fire's cause is under investigation. (AP Photo/Mark Thiessen)

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The burned remains of the Royal Suite Lodge in Anchorage, Alaska, are shown Wednesday, Feb. 15, 2017, after an early morning fire. Officials said several were injured in the deadly fire. The fire's cause is under investigation. (AP Photo/Mark Thiessen)

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FILE- In this Oct. 14, 2016, file photo, a rainbow arches over the Little Valley Fire, in Washoe Lake, Nev. An investigation into a prescribed burn that sparked a northern Nevada wildfire that destroyed 23 homes found several questionable practices on the part of the Nevada Division of Forestry, including understaffing despite an understanding that unstable weather conditions made for a potentially dangerous situation. (Andy Barron/The Reno Gazette-Journal via AP, File)

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FILE - In this Oct. 14, 2016, file photo, a firefighter hoses down the area on Mount Rose Highway and Edmonton Drive in Reno, Nev. An investigation into a prescribed burn that sparked a northern Nevada wildfire that destroyed 23 homes found several questionable practices on the part of the Nevada Division of Forestry, including understaffing despite an understanding that unstable weather conditions made for a potentially dangerous situation.(Mike Higdon/The Reno Gazette-Journal via AP, File)

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Former Vice President Al Gore, the founder and chairman of The Climate Reality Project, opens the Climate & Health Meeting at The Carter Center in Atlanta on Thursday, Feb. 16, 2017. The conference, which was organized after the Centers for Disease Control and Prevention canceled its own conference on climate change and health, brought together scientists, public health officials and health care providers. (AP Photo/Alex Sanz)

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Former Vice President Al Gore, the founder and chairman of The Climate Reality Project, opens the Climate & Health Meeting at The Carter Center in Atlanta on Thursday, Feb. 16, 2017. (AP Photo/Alex Sanz) ** FILE **

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Former Vice President Al Gore, the founder and chairman of The Climate Reality Project, opens the Climate & Health Meeting at The Carter Center in Atlanta on Thursday, Feb. 16, 2017. The conference, which was organized after the Centers for Disease Control and Prevention canceled its own conference on climate change and health, brought together scientists, public health officials and health care providers. (AP Photo/Alex Sanz)

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Oklahoma Attorney General Scott Pruitt, the Environmental Protection Agency Administrator-designate, is seen on Capitol Hill in Washington at his confirmation hearing before the Senate Environment and Public Works Committee on Jan. 18, 2017. (Associated Press) **FILE**

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FILE - In this Jan. 18, 2017 file photo, Environmental Protection Agency Administrator-designate, Oklahoma Attorney General Scott Pruitt is seen on Capitol Hill in Washington at his confirmation hearing before the Senate Environment and Public Works Committee. The Republican-controlled Senate is poised to confirm Pruitt on Thursday, Feb. 16, 2017. (AP Photo/J. Scott Applewhite, File)