LAS VEGAS, Nev. (KABC) -- Flash flood warnings are in effect Friday in Las Vegas after strong winds, lightning and heavy downpours struck overnight, flooding roads across Sin City.
Some people were seen being rescued from their cars by firefighters amid knee-deep water.
At the Circa Resort & Casino, visitors' cellphone videos showed water pouring from the ceiling and through a massive monitor in the sports book area.
The flooding comes during the heart of monsoon season. Sometimes desert areas in the Southwest can see all of their annual rain in just a few days.
But Las Vegas has been even drier than usual, leaving the parched soil to act like concrete during a night of heavy rainfall.
Meanwhile, in Kentucky, at least 16 people have been killed amid devastating flooding, Gov. Andy Beshear said Friday, and he expects that number to "get a lot higher."
More than 294 people have been rescued from floodwaters in eastern Kentucky so far, and that number will likely rise, Beshear said.
ABC News contributed to this report.