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Millions of people in Puerto Rico are feeling the full brunt of a powerful Hurricane Maria, which has been called the “worst hurricane in modern history” to hit the island.

To check on someone in Puerto Rico, call 202-778-0710.

The line may be busy due to the volume of calls coming in, but officials urge callers to keep trying.

Puerto Rico Tourism Company has set up a hurricane hotline for “hotels, guests and industry partners.” That number is 877-976-2400.

As of Wednesday afternoon, all of Puerto Rico was without electricity as the now-Category 3 storm continued to pummel the U.S. territory.

At its peak, Maria had sustained winds of at least 175 mph.