More than 1 million people are in the dark in Puerto Rico due to Hurricane Irma — nearly 70 percent of customers of Puerto Rico's Electric Power Authority are without power.
Puerto Rican Gov. Ricardo Rossello said Thursday that crews are investigating and until they know the extent of the damage, "it will be difficult to estimate how long the power outage will last."
Rossello warned the potentially deadly weather wasn't over, alerting residents to flash flooding and additional rain through Saturday after much of the island was drenched with 2 to 8 inches of rain. Bent trees, downed light posts and blocked roadways were common.
Ports on the island are still closed, and it's unclear when commercial flights will resume.
Schools and government offices are scheduled to reopen on Monday.
Irma is only the latest setback for Puerto Rico, which has been ravaged by an economic crisis for the last decade. Its crumbling infrastructure means that parts of the U.S. territory could be blacked out for months, authorities warned earlier in the week.