TALCA, Chile — One of the largest earthquakes ever recorded tore apart houses, bridges and highways in central Chile on Saturday and sent a tsunami racing halfway around the world. Chileans near the epicenter were tossed about as if shaken by a giant, and the head of the emergency agency said authorities believed at least 300 people were dead.
The magnitude-8.8 quake was felt as far away as Sao Paulo, Brazil — 1,800 miles to the east. The full extent of damage remained unclear as dozens of aftershocks — one nearly as powerful as Haiti's devastating Jan. 12 earthquake — shuddered across the disaster-prone Andean nation.
President Michelle Bachelet declared a "state of catastrophe" in central Chile but said the government had not asked for assistance from other countries. If it does, President Obama said the United States "will be there." Around the world, leaders echoed his sentiment.
The tsunami set off alarm sirens in Hawaii, Polynesia and Tonga, and prompted warnings across all 53 nations ringing the vast ocean.
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Small tsunami waves hit Hawaii, where little damage was reported. The U.S. Navy moved a half-dozen vessels out of Pearl Harbor as a precaution, Navy spokesman Lt. Myers Vasquez said. Shore- side Hilo International Airport was closed. In California, officials said a 3-foot surge in Ventura Harbor pulled loose several navigational buoys.
Late Saturday, Japan was still bracing for a direct hit and waves up to 10 feet high, though the first wave to hit Japan's outlying islands was just 4 inches high. Scientists worried the giant wave could gain strength as it rounds the planet and consolidates.
In Chile, newly built apartment buildings slumped and fell. Flames devoured a prison. Millions of people fled into streets darkened by the failure of power lines. The collapse of bridges tossed and crushed cars and trucks, and complicated efforts to reach quake-damaged areas by road.
At least 214 people were killed and 15 were missing as of Saturday evening, Bachelet said in a national address on television. While that remained the official estimate, Carmen Fernandez, head of the National Emergency Agency, said later: "We think the real figure tops 300. And we believe this will continue to grow."
Bachelet said 1.5 million people had been affected by the quake, and officials in her administration said 500,000 homes were severely damaged.
In Talca, just 65 miles from the epicenter, people sleeping in bed suddenly felt like they were flying through major airplane turbulence as their belongings cascaded around them from the shuddering walls at 3:34 a.m. (12:34 a.m. CST).
A deafening roar rose from the convulsing earth as buildings groaned and clattered. The sound of screams was mixed with the crash of plates and windows.
Then the earth stilled, silence returned and a smell of damp dust rose in the streets, where stunned survivors took refuge.
A journalist emerging into the darkened street scattered with downed power lines saw a man, some of his own bones apparently broken, weeping and caressing the hand of a woman who had died in the collapse of a cafe. Two other victims lay dead a few feet away.
Also near the epicenter was Concepcion, one of the country's largest cities, where a 15-story building collapsed, leaving a few floors intact.
"I was on the 8th floor and all of a sudden I was down here," said Fernando Abarzua, marveling that he escaped with no major injuries. He said a relative was still trapped in the rubble six hours after the quake, "but he keeps shouting, saying he's OK."
Chilean state television reported that 209 inmates escaped from prison in the city of Chillan, near the epicenter, after a fire broke out.
In the capital of Santiago, 200 miles to the northeast, the national Fine Arts Museum was badly damaged and an apartment building's two-story parking lot pancaked, smashing about 50 cars whose alarms rang incessantly.
A car dangled from a collapsed overpass while overturned vehicles lay scattered below. "I can now say in all surety that seat belts save lives in automobiles," said Cristian Alcaino, who survived the fall in his car.
While most modern buildings survived, a bell tower collapsed on the Nuestra Senora de la Providencia church and several hospitals were evacuated due to damage.
Santiago's airport was closed, with smashed windows, partially collapsed ceilings and destroyed pedestrian walkways in the passenger terminals. The capital's subway was shut as well, and transportation was further limited because hundreds of buses were stuck behind a damaged bridge.
Chile's main seaport, in Valparaiso about 75 miles from Santiago, was ordered closed while damage was assessed. Two oil refineries shut down, and lines of cars snaked out of service stations across the country as nervous drivers rushed to fill up.
President-elect Sebastian Pinera angrily reported seeing some looting while flying over damaged areas. He vowed "to fight with maximum energy looting attempts that I saw with my own eyes."
A tsunami swamped San Juan Bautista village on Robinson Crusoe Island off Chile, killing at least five people and leaving 11 missing, said Guillermo de la Masa, head of the government emergency bureau for the Valparaiso region. He said the huge waves also damaged several government buildings on the island.
Pedro Forteza, a pilot who frequently flies to the island, said, "The village was destroyed by the waves, including the historic cemetery. I would say that 20 or 30 percent has disappeared."
On the mainland, several huge waves inundated part of the major port city of Talcahuano, near the hard-hit city of Concepcion. A large boat was swept more than a block inland.
Waves also flooded hundreds of houses in the town of Vichato.
About 13 million people live in the area where shaking was strong to severe, according to the U.S. Geological Survey. USGS geophysicist Robert Williams said the Chilean quake was hundreds of times more powerful than Haiti's magnitude-7 quake, though it was deeper and cost far fewer lives.
More than 50 aftershocks topped magnitude 5, including one of magnitude 6.9.