TOKYO — A ferocious tsunami unleashed by Japan’s biggest recorded earthquake slammed into its eastern coast Friday, killing hundreds of people as it carried away ships, cars and homes, and triggered widespread fires that burned out of control.

Hours later, the waves washed ashore the U.S. West Coast, where evacuations were ordered from California to Washington but little damage was sustained. The entire Pacific had been put on alert — including coastal areas of South America, Canada and Alaska — but waves were not as bad as expected.

In northeastern Japan, the area around a nuclear power plant was evacuated after the reactor’s cooling system failed and pressure began building inside.

Police said 200 to 300 bodies were found in the northeastern coastal city of Sendai, the city in Miyagi prefecture, or state, closest to the epicenter. Another 137 were confirmed killed, with 531 people missing. Police also said 627 people were injured.

The magnitude-8.9 offshore quake unleashed a 23-foot (seven-meter) tsunami and was followed for hours by more than 50 aftershocks, many of them of more than magnitude 6.0.

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