Rescuers pulled survivors from rubble Sunday after the strongest earthquake to hit Ecuador in decades flattened buildings and buckled highways along its Pacific coast.
Ecuador's president says the earthquake death toll in country has risen to at least 272 and is sure to go much higher. Vice President Jorge Glas said more than 2,500 were injured in the powerful quake.
After visiting areas hard hit by the quake, Rafael Correa gave the new count to reporters early Monday and said it would "surely rise, and in a considerable way."
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Correa says Ecuador will overcome the tragedy.
He said: "The Ecuadorean spirit knows how to move forward, and will know how to overcome these very difficult moments."
The magnitude-7.8 quake, the strongest to hit Ecuador since 1979, was centered on Ecuador's sparsely populated fishing ports and tourist beaches, 105 miles (170 kilometers) northwest of Quito, the capital.
Correa flew back from Rome to deal with the crisis.
Glas said there were deaths in the cities of Manta, Portoviejo and Guayaquil — all several hundred kilometers (miles) from the center of the quake, which struck shortly after nightfall Saturday.
In Pedernales, a town of 40,000 near the quake's epicenter, dozens of frightened residents slept in the streets while men equipped with little more than car headlights tried to rescue survivors who could be heard trapped under the rubble.
"We're trying to do the most we can, but there's almost nothing we can do," said Pedernales Mayor Gabriel Alcivar.
Alcivar pleaded for authorities to send earth-moving machines and rescue workers to help find people in the rubble. He said looting had broken out amid the chaos but authorities were too busy trying to save lives to re-establish order.
"This wasn't just a house that collapsed. It was an entire town," he said.
Correa declared a national emergency and urged Ecuadoreans to stay strong.
"Everything can be rebuilt, but what can't be rebuilt are human lives, and that's the most painful," he said in a telephone call to state TV before departing Rome for Manta.
Glas said the country had already deployed 10,000 armed forces. In addition, 4,600 national police were sent to towns near the epicenter. He said there is a long list of missing people that authorities are looking for but he has declined to disclose the number. He says only that the number of casualties is expected to go up more.
Would-be rescuers scrambled through the ruins in the provincial capital Portoviejo, digging with their hands to find survivors. As officials set up shelters and field hospitals, residents said they felt like their entire town had been flattened.
More than 3,000 packages of food and nearly 8,000 sleeping kits were being delivered. Electricity in Manabi province, the hardest-hit, remained mostly down as authorities focused on finding survivors.
"Compatriots: Unity, strength and prayer," Glas told a throng of residents gathered in the streets of Manta as he instructed them on how to look for survivors. "We need to be quiet so we can hear. We can't use heavy machinery because it can be very tragic for those who are injured."
On social media, Ecuadorians celebrated a video of a baby girl being pulled from beneath a collapsed home in Manta.
Shanty towns and cheaply-constructed brick and concrete homes were reduced to rubble along the quake's path, while in Guayaquil a shopping center's roof fell down and a collapsed highway overpass crushed a car. In Manta, the airport closed after the control tower collapsed, injuring an air traffic control worker and a security guard.
Alberto Reynas, 58, was fishing off the coast of Pedernales when giant waves violently rocked his boat.
"It felt the same on sea as it did on land," he said.
But he was shaken again when he returned to land to find the facade of his two-story home had fallen off into the streets. He has been unable to communicate with members of his family and spent the night sleeping outdoors with neighbors, keeping a close watch against thieves.
"It's pure sadness. Everything is destroyed," he said.
Luis Quito said he spent the entire night delivering water to guests trapped under the rubble of a small, four-story Hotel Chimborazo owned by his father-in-law, who was missing and he believed dead.
"We hear screaming all through night," said Quito, wailing as he expressed outrage over the slow response of authorities. "There are humans trapped below the terrace. Babies. We need rescuers. But nobody has arrived so far."
In the capital Quito, terrified people fled into the streets as the quake shook their buildings. It knocked out electricity in several neighborhoods and a few homes collapsed but after a few hours power was being restored.
Among those killed was the driver of a car crushed by an overpass that buckled in Guayaquil, the country's most populous city. The city's international airport was also briefly closed. Hydroelectric dams and oil pipelines in the OPEC-member nation were shut down as a precautionary measure but so there were no reports of damage to them.
Towns near the epicenter were evacuated as a precautionary measure in case of hazardous tsunami waves but several hours later authorities said was safe for coastal residents to return to their homes.
Ecuador's ally Venezuela pledged humanitarian aid while neighbor Colombia, where the quake was also felt, said it stands ready to help in any way possible. The government is drawing on $600 million in emergency funding from multilateral banks to rebuild, Correa said.
The U.S. Geological Survey originally put the quake at a magnitude of 7.4 then raised it to 7.8. It had a depth of 19 kilometers (12 miles). More than 135 aftershocks followed, one as strong as magnitude-5.6, and authorities urged residents to brace for even stronger ones in the coming hours and days.
David Rothery, a professor of geosciences at The Open University northeast of London said the quake was about six times as strong as the most powerful of two deadly earthquakes across the Pacific, in the southernmost of Japan's four main islands.
A magnitude-6.5 earthquake struck Thursday near Kumamoto, followed by a magnitude-7.0 earthquake just 28 hours later. The quakes have killed 41 people and injured about 1,500, flattened houses and triggered major landslides.
On Sunday, thousands of rescue workers searched a debris-strewn village in southern Japan for about a half-dozen missing people as U.S. military aircraft rushed to join the relief mission.