Forecasters warned Friday of the potential for flash flooding over the weekend.
The National Weather Service issued a flash flood watch for all of southern Nevada from Saturday afternoon until Monday evening.
FOX5 Chief Meteorologist Stacey Donaldson said monsoon moisture is increasing across the region and, combined with daytime heating, will produce thunderstorms in the afternoon and evenings.
"Some of these storms will include gusty winds, heavy downpours and lightning," Donaldson said. "The flooding risk is very high."
On Friday night, a pair of powerful storms downed trees and power lines across the Las Vegas Valley. It also flooded dozens of roads, including the Las Vegas Strip.
Officials also warned that heavy rain over the Spring Mountains, which have been ravaged by the Carpenter 1 wildfire, may cause debris flows to tumble into the valleys below.
The storms may cause some roadways to become flooded, forecasters said. They said drivers should turn around and find an alternate road if they come upon a water-covered road.
Donaldson said temperatures will hover near 100 degrees during the weekend, before dipping into the 90s early next week.
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