Photos from the aftermath of the storm showed extensive damage on the small Caribbean island.
Officials said the entire island could be without power for up to six months.
Maria is continuing to devastate the Caribbean.
Melissa Joan Hart's Instagram post in which she complains about Hurricane Maria ruining their family vacation drew criticism from netizens.
Hurricane Maria has already been deadly.
Photos showed destruction left behind at the airport in Puerto Rico.
The storm was expected to brush by the island Wednesday and Thursday, bringing storm conditions to Haiti and the Dominican Republic.
The storm's eyewall passed through both islands as a Category 5 storm Wednesday morning.
Maria made landfall in Puerto Rico
Geostationary satellite images and surface observations indicate that the center of the hurricane made landfall near Yabucoa around 6:15 a.m. AST (6:15 a.m. EDT).
The damage wrought by Irma makes certain Caribbean regions far more susceptible to devastation from Hurricane Maria.
Hurricane Maria takes aim at Puerto Rico next.
Hurricane Maria struck Dominica Monday night.
Prime Minister of Dominica, Roosevelt Skerrit, took to Facebook, stating that his roof had been blown off by the hurricane, leaving him and his family in a vulnerable position.
The storm slammed into Puerto Rico early Wednesday morning as a Category 4 hurricane.
Puerto Rico braces for Hurricane Maria.
The storm could strengthen as it makes its way toward islands already devastated by Hurricane Irma.
Hurricane watch and warnings have been issued for several Caribbean islands, which were previously devastated by Category 5 Hurricane Irma earlier this month.
The hurricane remained in the Atlantic Ocean but was expected to bring storm conditions to the East Coast.
Jose remained a Category 1 hurricane with winds of up to 105 mph.
Stranded tourists took to social media to claim that Marriott Hotels refused to let more than 30 people onto a rescue boat that was leaving for San Juan, Puerto Rico, even though there were open seats.
We might nervously scratch ourselves when we are stressed out and anxious because it tells other people not to attack us. It works for rhesus monkeys, after all.