Iran Press/ America: Kentucky Governor Andy Beshear expected the death toll to continue to rise. He said hundreds of homes and businesses had been flooded.
US President Joe Biden has declared the floods "a major disaster" and ordered federal aid to help local rescuers.
Among the dead are at least six children, including a one-year-old.
Scientists say climate change triggers more extreme weather events like the Kentucky flooding.
After an aerial tour with the National Guard, Mr. Beshear said the flood was "by far the worst" he had seen.
"There's still a lot of people out there, still a lot of people unaccounted for. We're going to do our best to find them all," he added, warning that it could take weeks to find all the victims.
Hundreds of people have been rescued by boat or helicopter.
There is widespread poverty in affected areas, where at least 33,000 people now have no electricity. The flooding - after torrential rain - caused mudslides and made roads impassable.
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Floods in US Kentucky kill at least 8, more deaths expected
