A U.S. Army helicopter transports material to repair the Guajataca Dam, damaged during Hurricane Maria, in Quebradillas, Puerto Rico, Tuesday, Oct. 17, 2017. The dam was built around 1928, and holds back a man-made lake. (AP Photo/Ramon Espinosa)

A U.S. Army helicopter transports material to repair the Guajataca Dam, damaged during Hurricane Maria, in Quebradillas, Puerto Rico, Tuesday, Oct. 17, 2017. The dam was built around 1928, and holds back a man-made lake. (AP Photo/Ramon Espinosa)

In this Friday, Oct. 13, 2017 photo, a student sits alone in a classroom at Ramon Marin Sola Elementary School, which opened its doors as a daytime community center after the passing of Hurricane Maria in Guaynabo, Puerto Rico. Because Hurricane Maria followed closely after Hurricane Irma, students have had only about six weeks of class since the academic year started Aug. 14. (AP Photo/Carlos Giusti)

In this Friday, Oct. 13, 2017 photo, youths chat at the Ramon Marin Sola Elementary School, which opened its doors as a daytime community center after the passing of Hurricane Maria in Guaynabo, Puerto Rico. Children have been living in campus-turned-shelters in western Puerto Rico since Hurricane Maria flooded their homes, trying to pass the time while their families wait for help to replace the homes they lost in the storm. (AP Photo/Carlos Giusti)

In this Friday, Oct. 13, 2017 photo, 15-year-old Andy Gualdado cycles with friends in Plaza Barcelo on what would normally be a school day, after Hurricane Maria in Guaynabo, Puerto Rico. Gualdado says the novelty of being out of school has worn off and he misses friends he used to talk to every day. "Now, I'd like to go to school," Gualdado said. (AP Photo/Carlos Giusti)

In this Friday, Oct. 13, 2017 photo, children journal about Hurricane Maria at Ramon Marin Sola Elementary School which opened its doors as a daytime community center after the passing of Hurricane Maria in Guaynabo, Puerto Rico. Some children are writing about what they bought before the storm and what they lost, and what they hope for their home. (AP Photo/Carlos Giusti)

In this Friday, Oct. 13, 2017 photo, a youth sits in the courtyard of Ramon Marin Sola Elementary School, which opened its doors as a daytime community center after the passing of Hurricane Maria in Guaynabo, Puerto Rico, Most schools remain closed, leaving kids to pass the time playing on downed trees or using precious phone battery on video games, waiting for life to return to normal as the adults around them struggle to put their own lives back together. (AP Photo/Carlos Giusti)

In this Friday, Oct. 13, 2017 photo, a school cafeteria staff member prepares lunch at Ramon Marin Sola Elementary School, which opened its doors as a daytime community center after the passing of Hurricane Maria in Guaynabo, Puerto Rico. While public schools are closed, some are serving as community centers for kids and elderly people to spend part of each day and get breakfast and lunch. (AP Photo/Carlos Giusti)

In this Friday, Oct. 13, 2017 photo, a girl waits for her mother in the hallway of Ramon Marin Sola Elementary School, which opened its doors as a daytime community center after the passing of Hurricane Maria in Guaynabo, Puerto Rico. "We're trying teach them how to be happy again," said the school's Director Zoraya Cruz. "We're not worried about the curriculum right now. We want them to feel comfortable and safe." (AP Photo/Carlos Giusti)

In this Friday, Oct. 13, 2017 photo, Education Secretary Julia Keleher gets a hug from a student at Ramon Marin Sola Elementary School, which opened its doors as a daytime community center after the passing of Hurricane Maria in Guaynabo, Puerto Rico. Teachers were supposed to report back to their assigned schools on Oct. 16 to prepare for a resumption of classes next week, but the start date has been pushed to no sooner than Oct. 30. (AP Photo/Carlos Giusti)

In this Friday, Oct. 13, 2017 photo, girls play a board game at the Ramon Marin Sola Elementary School, which opened its doors as a daytime community center after the passing of Hurricane Maria in Guaynabo, Puerto Rico. Many kids seem to be making the most of what feels like an extended vacation, but for some the novelty has worn off and want classes to start up again. (AP Photo/Carlos Giusti)

A U.S. Army helicopter transports material to repair the Guajataca Dam, damaged during Hurricane Maria, in Quebradillas, Puerto Rico, Tuesday, Oct. 17, 2017. The dam was built around 1928, and holds back a man-made lake. (AP Photo/Ramon Espinosa)

A boy accompanied by his dog watches the repairs of Guajataca Dam, which cracked during the passage of Hurricane Maria, in Quebradillas, Puerto Rico, Tuesday, Oct. 17, 2017. The dam was built around 1928, and holds back a man-made lake. (AP Photo/Ramon Espinosa)

A toy car sits among items destroyed by flooding from Hurricane Maria, waiting to be picked up by the garbage service in the street in Toa Baja, Puerto Rico, Monday, Oct. 16, 2017. With hundreds of thousands of people still without running water, and 20 of the island’s 51 sewage treatment plants out of service, there are growing concerns about contamination and disease. (AP Photo/Ramon Espinosa)

In this Saturday, Oct. 14 2017 photo, people affected by Hurricane Maria bathe in water piped from a mountain creek, in Utuado, Puerto Rico. Raw sewage is pouring into the rivers and reservoirs of Puerto Rico in the aftermath of Hurricane Maria. Puerto Ricans without running water are bathing and washing their clothes in contaminated streams. At least four people have died of diseases caught from dirty water. (AP Photo/Ramon Espinosa)

In this Saturday, Oct. 14, 2017 photo, Arturo de Jesus Melendez, center, sits with his wife Madeli and their children Alexis and Arturo on their mattresses inside a classroom at a school-turned-shelter after they were left homeless by Hurricane Maria in Toa Baja, Puerto Rico. Arturo lost his job at a cattle ranch owned by a Dominican citizen after Hurricane Maria killed the herd and the owner returned to his native country. Arturo and his wife Madeli were separated and recently got back together after the storm. (AP Photo/Ramon Espinosa)

In this Saturday, Oct. 14, 2017 photo, Arden Dragoni, second from left, poses with his wife Sindy, their three children and dog Max, surrounded by what remains of their home destroyed by Hurricane Maria in Toa Baja, Puerto Rico. The Dragoni family has been living in a shelter set up at a school since the storm destroyed their wooden home in late September. They lost everything: clothes, household goods, and an old car. Dragoni supported his family by working construction, but his employers are currently out of business, leaving him and his family without a source of income. (AP Photo/Ramon Espinosa)

In this Saturday, Oct. 14, 2017 photo, what was once the home Arden Dragoni and his family lays in ruins after the passing of Hurricane Maria in Toa Baja, Puerto Rico. The Dragoni family lost everything on Sept. 20: clothes, household goods, and an old car, as well as the family's source of income: Arden Dragoni's construction work. (AP Photo/Ramon Espinosa)

In this Saturday, Oct. 14, 2017 photo, Silvie Lise Santiago holds her daughter on the floor of their home, the floor above her father's home, both of which were destroyed by Hurricane Maria, as she talks to her neighbor Arden Dragoni, not in picture, who was also left homeless in Toa Baja, Puerto Rico. Santiago said her family of five planned to put a roof over the bathroom, right, and a small room behind it that still has walls, so they can move out of their neighbor's home where they ran to for shelter in the middle of the storm on Sept. 20. (AP Photo/Ramon Espinosa)

In this Saturday, Oct. 14, 2017 photo, Arturo de Jesus Melendez sleeps in his car with a shirt over his eyes, after he couldn't sleep in the school-turned-shelter due to the noise in Toa Baja, Puerto Rico. Arturo, a cattle ranch worker who recently got back together with his wife and two sons after the storm, said he hopes to rebuild his family's home, but it will depend on financial help from the government. (AP Photo/Ramon Espinosa)

Items destroyed by flooding from Hurricane Maria sit in the street, waiting to be picked up by the garbage service, in Toa Baja, Puerto Rico, Monday, Oct. 16, 2017. With hundreds of thousands of people still without running water, and 20 of the island’s 51 sewage treatment plants out of service, there are growing concerns about contamination and disease. (AP Photo/Ramon Espinosa)

In this Saturday, Oct. 14 2017 photo, people affected by Hurricane Maria collect water and while others bathe in water piped from a mountain creek, in Utuado, Puerto Rico. Nearly a month after the Hurricane Maria made landfall, hundreds of thousands of people are still without running water, and 20 of the island’s 51 sewage treatment plants are out of service. (AP Photo/Ramon Espinosa)

In this Oct. 15, 2017 photo, electrical lineman work on transmission towers in Barceloneta, Puerto Rico. Gov. Ricardo Rossello says he is pushing for outside aid to restore electricity and his goal is to have it back for half the island by Nov. 15 and for 95 percent by Dec. 31. But he conceded the task of rebuilding the transmission and distribution network is enormous. (AP Photo/Ramon Espinosa)

People affected by Hurricane Maria bathe in water piped from a creek in the mountains, In Utuado, Puerto Rico, Saturday, Oct. 14, 2017. Residents of the area drive to the pipes to bathe because they were left without water supplies by the damage caused by Hurricane Maria. (AP Photo/Ramon Espinosa)