Amit Negi, an official in Uttarakhand state, said more than a dozen people were killed in one district alone.
A landslide triggered by the monsoon rains buried a bus, killing three people in Almora district. At least three other people were washed away when a three-storey apartment building toppled into a river and was carried away by the swift-moving current.
More than 10,000 pilgrims stranded along a mountain pass leading to a Hindu religious site were being evacuated by helicopter.
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