As intense rain enveloped parts of Riverside County Thursday, numerous roads were shut down because of flooding.

At 10:40 a.m., the California Highway Patrol requested an emergency closure of Temescal Canyon Road where it meets Interstate 15 due to several feet of water submerging the roadway surface, creating hazardous conditions that threatened to leave motorists stranded.

The agency warned about the same time that a portion of the westbound Pomona (60) Freeway at Hall Avenue in Jurupa Valley was underwater, making at least two lanes impassable. There was no hard closure because motorists were still able to squeeze into two lanes to get around the flooded section, according to reports from the scene.

Riverside County Transportation Department officials were deployed throughout the western county region, closing roads either flooded or caked with muck and debris that made driving conditions dangerous.

Temescal Canyon Road between Horsethief Canyon Road and Indian Truck Trail just north of Lake Elsinore was closed after it became submerged.

The intersection of Bosley Lane and Colt Drive in Horsethief Canyon, also north of Lake Elsinore, was swamped, forcing a closure.

In Cherry Valley, Brookside Avenue between Bellflower and Cherry avenues was closed after it flooded Thursday morning.

In Nuevo, just east of Perris, Pico Avenue was closed between Nuevo Road and San Jacinto Avenue due to flooding.

Central Avenue between Pico and Menifee Road in the same area was also closed.

And crews shut down Box Springs Mountain Road north of Moreno Valley due to rock and debris flows, according to county officials.

The National Weather Service issued a “severe alert” for most of the western county region until 1:30 p.m. as cells produced heavy rainfall.

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