Puerto Rico Gov. Ricardo Rosselló said the island is facing an "unprecedented disaster" after the storm made landfall as a powerful Category 4 hurricane last week.
While about 5 percent of electricity had been restored across the island by Monday night, generators remain the only source of power for more than 3 million American citizens.
The storm killed at least 16 and left the island littered with rubble from demolished homes and downed trees and power lines.
How to help relief efforts
Donate supplies: Puerto Rico's government created a presentation on the emergency and construction supplies needed to help those in need. It is also urging people to use social media to encourage people to donate to the relief fund. Puerto Rico's first lady, Beatriz Rosselló, has also set up a relief fund called United for Puerto Rico, which connects those in need to the private sector.
Email Puerto Rico's disaster relief team at firstname.lastname@example.org. Because of high volume, officials are asking that people only send one email and no follow-ups. Include as much information about the people you are concerned about and your contact information.
Call the Puerto Rico Federal Affairs Administration's Washington, D.C., office at 202-800-3133 or 202-800-3134. Staffers are taking names and numbers to develop plans on conducting welfare checks.