It's been seven days since the storm made landfall, and 95 percent of Puerto Rico is still without electricity.
More than 3 million U.S. citizens there are suffering in temperatures in the 80s with 90 percent humidity.
SEE ALSO: How to help Puerto Rico in wake of Hurricane Maria
The mayor of San Juan said they are not receiving help fast enough.
"President Trump, please whatever you need to do, let FEMA do their job," said Mayor Carmen Yulin Cruz.
The president said Tuesday that he plans to visit Puerto Rico next week, the earliest he said he can go without disrupting recovery operations.
Trump pointed out some differences between Texas and Florida, which were hit hard by other hurricanes, and the island territory in a series of tweets Monday night."
"Texas & Florida are doing great but Puerto Rico, which was already suffering from broken infrastructure & massive debt, is in deep trouble."
On Tuesday, FEMA announced more federal aid is being sent to the U.S. territory.
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