Aid has been slow to arrive after a Category 5 storm tore through Acapulco.
Four people remain missing, Rosa Icela Rodríguez Rodríguez, the country's security secretary, said.
The U.S. Geological Survey said the quake had a preliminary magnitude of 7 and was centered about 10 miles northeast of Acapulco.
At least fifteen people were killed during the weekend in the state of Guerrero.