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 authorities said nearly 150 people were dead.
The magnitude-8.8 quake was felt as far away as Sao Paulo in Brazil -- 1,800 miles (2,900 kilometers) to the east. The full extent of damage remained unclear as scores 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 has not asked for assistance from other countries. If it does, President Barack Obama said, the United States "will be there." Around the world, leaders echoed his sentiment.
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 147 people were killed, according to Carmen Fernandez, director of the National Emergency Agency. She said hundreds of thousands of people had their houses damaged or destroyed.
In Talca, just 65 miles (105 kilometers) 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. (1:34 a.m. EST, 0634 GMT).
A deafening roar rose from the convulsing earth as buildings groaned and clattered. The sound of screams was confused with the crash of plates and windows.
Then the earth stilled, silence returned and a smell of moist 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 (meters) 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."
In the capital of Santiago, 200 miles (325 kilometers) northeast of the epicenter, a car dangled from a collapsed overpass, 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.
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.
The jolt set off a tsunami that swamped San Juan Bautista village on Robinson Crusoe Island off Chile -- "a big wave that covered half of the village," said regional governor Ivan de la Maza.
It then raced across the Pacific, setting off alarm sirens in Hawaii, Polynesia and Tonga and prompting warnings across all 53 nations ringing the vast ocean.
Experts said 8-foot (2.5-meter) waves were likely to hit Hilo, Hawaii. Officials evacuated people and boats near the water and closed shore-side Hilo International Airport.
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.
The largest earthquake ever recorded struck the same area of Chile on May 22, 1960. The magnitude-9.5 quake killed 1,655 people and left 2 million homeless. It caused a tsunami that killed people in Hawaii, Japan and the Philippines and caused damage along the west coast of the United States.
Saturday's quake matched a 1906 temblor off the Ecuadorean coast as the seventh-strongest ever recorded in the world.
Eva Vergara reported from Santiago, Chile. Associated Press writers Eduardo Gallardo in Santiago and Sandy Kozel in Washington contributed to this report.