ASUNCIÓN IXTALTEPEC, Mexico — The death toll from Mexico’s strongest earthquake in living memory rose to 90 on Sunday, as the people of southern Oaxaca State mourned their dead and rescue workers began assessing the damage in small towns where dust still hung in the air.

The state of Oaxaca was hit the hardest, with 71 dead, said Águeda Robles, a spokeswoman for the state civil protection agency. Another 15 were reported to have died in Chiapas, the state to Oaxaca’s southeast, with four fatalities in neighboring Tabasco State.

More than two days after the quake struck late Thursday, violent aftershocks continued to jolt the largest city in the region, Juchitán de Zaragoza, and the surrounding towns on Sunday. In Asunción Ixtaltepec, about five miles away, search dogs clambered over rubble with their handlers on Sunday, looking for signs of life.

For those whose worst fears were confirmed, there were funerals, with processions haltingly making their way to cemeteries to the traditional sounds of Oaxaca’s drums and trumpets.