Electric power generation

People sunbathe on a beach during a hot summer day in Barcelona, Spain, Saturday, Aug. 4, 2018. Hot air from Africa is bringing a heat wave to Europe, prompting health warnings about Sahara Desert dust and exceptionally high temperatures that could peak at 47 degrees Celsius (117 Fahrenheit) in Spain and Portugal. (AP Photo/Manu Fernandez)

A man paddles his boat through a flooded village in the Samamxay district, Attapeu province, Laos on Thursday, Jul. 26, 2018. Authorities and the builder are investigating why a dam in southeastern Laos collapsed earlier this week, killing at least two dozen people and leaving over a hundred missing. (AP Photo/Hau Dinh)

FILE - In this Jan. 31, 2018, file photo, the sun rises beyond power lines in St. Charles Parish, La. Homeland Security officials say that Russian hackers used conventional tools to trick victims into entering passwords in order to build out a sophisticated effort to gain access to control rooms of utilities in the U.S. The victims included hundreds of vendors that had links to nuclear plants and the electrical grid. (AP Photo/Gerald Herbert, File)

In the image made from aerial video taken Tuesday, July 24, 2018, villages are inundated with floodwaters from a collapsed dam in Attapeu province, southeastern Laos. The KPL news agency said Wednesday on its website that officials in Attapeu province also reported more than 1,300 houses damaged by flooding after an auxiliary dam at the Xepian-Xe Nam Noy hydropower project partially collapsed on Monday night. (LNT via AP)

A villager takes refuge on a rooftop above flood waters from a collapsed dam in the Attapeu district of southeastern Laos, Tuesday, July 24, 2018. The official Lao news agency KPL reported Tuesday that the Xepian-Xe Nam Noy hydropower dam in Attapeu province collapsed Monday evening, releasing large amounts of water that swept away houses and made more than 6,600 people homeless. (Attapeu Today via AP)

Villagers take refuge on a rooftop above flood waters from a collapsed dam in the Attapeu district of southeastern Laos, Tuesday, July 24, 2018. The official Lao news agency KPL reported Tuesday that the Xepian-Xe Nam Noy hydropower dam in Attapeu province collapsed Monday evening, releasing large amounts of water that swept away houses and made more than 6,600 people homeless. (Attapeu Today via AP)

FILE - In this Sept. 20, 2017 file photo, electricity poles and lines lie toppled on the road after Hurricane Maria hit the eastern region of the island, in Humacao, Puerto Rico. Ten months after Hurricane Maria destroyed Puerto Rico’s electric grid, the local agency responsible for rebuilding it is in chaos and more than $1 billion in federal funds meant to strengthen the rickety grid is going unspent, according to contractors and U.S. officials who say they’re eager to make progress before the next hurricane. (AP Photo/Carlos Giusti, File)

FILE - In this May 1, 2018 file photo, the Richmond city skyline can be seen on the horizon behind the coal ash ponds along the James River near Dominion Energy's Chesterfield Power Station in Chester, Va. The Trump administration is easing rules for handling toxic coal ash from more than 400 coal-fired power plants across the U.S. after utilities objected to regulations adopted under former President Barack Obama. Environmental Protection Agency acting Administrator Andrew Wheeler said Wednesday, July 18, 2018, the changes will save utilities roughly $30 million annually. (AP Photo/Steve Helber, File)