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(CNN) More than 15,000 people are being housed in temporary shelters after a powerful earthquake on Sunday jolted central Italy, a region battered by repeated tremors since August.

Dramatic images from the disaster zone show villages that appear entirely flattened, with historic buildings, including churches, crumbling when the quake struck 10 kilometers below the earth's surface.

Temporary shelters set up in the town of Arquata del Tronto following Sunday's massive earthquake

Remarkably, there have been no reports of deaths from the 6.6-magnitude quake -- the strongest to hit the country in more than three decades -- as many of the towns had been evacuated following a devastating earthquake in August, which killed almost 300 people, as well as a string of tremors earlier last week.

Titti Postiglione, spokeswoman for Italy's Civil Protection agency, told reporters Monday that the number of people in temporary shelter was expected to grow as the agency continued its work in affected areas.

"We are working under extremely difficult conditions," she said. "The roads were already compromised after the previous quakes and now they're even worse."

The region is also being rattled by frequent aftershocks, creating a risk of falling debris for rescue workers to contend with.

Residents prepare to spend the night in a camp set up in a warehouse in the village of Caldarola on Sunday following the quake.

Of the 15,000 people receiving shelter, more than 4,000 have been placed in hotel rooms on the Adriatic coast, while 10,000 are in temporary shelters in the regions of Umbria and Marche.

Daniele Gatti, director of the Holiday Hotel in Porto Sant'Elpidio on the Adriatic Coast, said 500 people displaced by the earthquake were staying at the venue, including many elderly people and children.

"People arrived yesterday in very traumatic conditions, but they seem to be doing better now as they are fitting in the place," he said. He said he had heard that the displaced people could be there for up to six months.

More than 1,100 additional people are still in shelters from August's quake in Amatrice, not far from the site of Sunday's tremors. The true number of displaced since then, however, is believed to be much higher, as many victims have taken shelter with family or friends.

Mayor: We must 'start from scratch'

The deadly quake in August caused severe damage across several towns in central Italy, and Sunday's tremor brought down some of the weakened structures left standing.

It destroyed part of the remaining bell tower in Amatrice, which stood above the rubble as a symbol of hope in August's devastating quake.

The bell tower of Amatrice, which remained standing after the August earthquake, is seen with its top partly collapsed after Sunday's tremor.

"We will have to start from scratch," Michele Franchi, the deputy mayor of Arquata del Tronto, one of the towns hit by the quake, told Italy's Rai television.

The biggest historic loss Sunday was the Basilica of San Benedetto in Norcia, which many residents consider to be the heart of the city. It collapsed after the quake, leaving only its façade and the back part of its foundation intact.

A view of the facade of the San Benedetto Basilica, in Norcia, after the quake on Sunday.

'At their wits' end'

Many communities in central Italy are tiring of the quakes, and some are refusing to leave. Some residents slept in their cars over the weekend through the tremors.

"Everyone has been suspended in a never-ending state of fear and stress. They are at their wits' end," Bishop Renato Boccardo of Norcia told Reuters.

As Franchi, Arquata del Tronto's deputy mayor, told Rai television: "This morning's quake has hit the few things that were left standing."

The quake was felt as far north as the Alps, Curcio said, and as far south as Rome, some 90 kilometers (56 miles) away. The metro in Rome has been shut down as authorities continue to survey the area, municipal officials said.

Photos: Another earthquake rocks central Italy A graveyard in Campi, central Italy, lies in ruins on Monday, October 31, after another powerful earthquake struck the region on Sunday. No deaths have been reported from the 6.6-magnitude quake as many towns in the affected area were evacuated following a devastating earthquake in August, which killed almost 300 people. Hide Caption 1 of 14 Photos: Another earthquake rocks central Italy Italian authorities register people for temporary accommodations in the Adriatic coastal town of Porto Sant'Elpidio on October 31, after more than 15,000 were displaced by the latest earthquakes to hit central Italy. Hide Caption 2 of 14 Photos: Another earthquake rocks central Italy A statue of St. Benedict remains standing in front of the damaged bell tower in the town of Norcia on October 31. Hide Caption 3 of 14 Photos: Another earthquake rocks central Italy A general view of Arquata del Tronto shows the extent of damage to the town in the region of Perugia on Sunday, October 30. Hide Caption 4 of 14 Photos: Another earthquake rocks central Italy Residents from the village of Caldarola prepare to spend the night in an emergency camp set up in a warehouse on October 30. Hide Caption 5 of 14 Photos: Another earthquake rocks central Italy A firefighter and a soldier survey rubble in Amatrice on October 30. The latest quake on Sunday was the strongest to hit the country in more than three decades. Two other quakes struck the same region within the past week. Amatrice's town center also was badly damaged in a deadly temblor in August. Hide Caption 6 of 14 Photos: Another earthquake rocks central Italy The tower of the Church of the Madonna of the Angels remains standing amid rubble near Norcia on October 30. Hide Caption 7 of 14 Photos: Another earthquake rocks central Italy A man rides a bicycle past cracks in a road in Norcia on October 30. The quake struck 6 kilometers (3.7 miles) north of Norcia, the US Geological Survey reported. Hide Caption 8 of 14 Photos: Another earthquake rocks central Italy The strong quake leaves buildings damaged in Arquata del Tronto on October 30. Hide Caption 9 of 14 Photos: Another earthquake rocks central Italy A group of nuns leave the center of Norcia on October 30 after being rescued earlier. Residents ran onto the streets in a panic when the quake struck in the morning. Hide Caption 10 of 14 Photos: Another earthquake rocks central Italy The facade of the Basilica of San Benedetto in Norcia remains standing on October 30, but much of its core has collapsed. Hide Caption 11 of 14 Photos: Another earthquake rocks central Italy Italian civil protection personnel pass a collapsed wall in Norcia on October 30. Hide Caption 12 of 14 Photos: Another earthquake rocks central Italy An aerial view shows the destruction in the hilltop town of Amatrice following the earthquake on October 30. Hide Caption 13 of 14 Photos: Another earthquake rocks central Italy Firefighters from Vatican City check out St. Paul's Basilica in Rome on October 30 following the earthquake. Several buildings in the Italian capital have suffered minor damage from the series of quakes. Hide Caption 14 of 14

Schools in Rome are closed Monday so buildings can be surveyed for any structural damage, according to the site of Rome's municipal government. Several buildings have suffered minor damage from the series of earthquakes.

More than 15,000 people are being housed in temporary shelters following Sunday's quake

CNN International meteorologist Derek Van Dam, noting that Sunday's quake was Italy's strongest in 36 years, said that Wednesday's temblors were "considered foreshocks" ahead of Sunday's "main earthquake."