Second day of heavy rain leads to flash flooding in Las Vegas.

Monsoonal rains and thunderstorms overtook Las Vegas on Thursday evening for the second night in a row, causing flash flooding that turned parts of the Strip into rivers.

Up to an inch of rain fell on the city in about two hours — about half the rainfall for the year in the area that had been suffering a drought, said Andy Gorelow, a meteorologist with the National Weather Service in Nevada. Winds reached up to 71 miles per hour in the Las Vegas Valley, almost the speed of a Category 1 hurricane.

Videos on social media showed casinos flooding and cars getting stuck on roads.

About 7,600 people were left without power Thursday evening after the thunderstorm, according to local reports. By Friday morning, many of the outages were fixed, leaving about 150 affected customers according to a Nevada Energy outage map.

On Friday morning, a local office of the state Department of Motor Vehicles had to open late because of water damage and said on Twitter that some of its technology was affected.

Las Vegas expected the same system to drench the area Friday evening. The Weather Service did not issue an official warning but asked residents to “stay alert.”