Tropical Storm Hilary, the first tropical storm to impact Southern California in 84 years, brought heavy rain and significant flooding to Ventura and Los Angeles counties. Rainfall totals were very impressive with mountain areas receiving 3 to 9 inches of rainfall while coastal and valley areas received 2.50 to 5 inches of rainfall. Rainfall rates were also very impressive with rates around 1 inch in less than an hour reported at times. With such heavy rainfall, numerous reports of flash flooding as well as mud and debris flows were received. As for winds, most areas reported gusts in the 30 to 50 MPH with local gusts in excess of 80 MPH in some mountains locations in Los Angeles county.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 18:34:00 to 20-AUG-23 20:30:00 (PST-8)
Location: NORTH HOLLYWOOD
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Burbank. Northbound lanes of Highway 170 were flooded.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 18:54:00 to 20-AUG-23 21:00:00 (PST-8)
Location: MEINERS OAKS
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Ojai. Numerous rocks were reported across Highway 33.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 18:47:00 to 20-AUG-23 20:30:00 (PST-8)
Location: PALMDALE
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Palmdale. Several parked vehicles were completely submerged in water.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 19:11:00 to 20-AUG-23 21:45:00 (PST-8)
Location: CASTAIC JCT
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Castaic. Significant flooding was reported on Interstate 5 near Halsey Canyon Road.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 19:28:00 to 20-AUG-23 21:45:00 (PST-8)
Location: HEWITT
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Burbank. Several vehicles were stuck in flood waters on Interstate 5 near Lankershim Boulevard.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 19:41:00 to 20-AUG-23 20:15:00 (PST-8)
Location: SYCAMORE
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near Point Mugu Naval Base. On Highway 1, several rocks fell on a vehicle.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 20:01:00 to 20-AUG-23 22:00:00 (PST-8)
Location: GREENWICH VLG
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Westlake Village. Significant flooding was reported on the Westlake Boulevard onramp on Highway 101.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 20:45:00 to 20-AUG-23 22:00:00 (PST-8)
Location: CORNELL
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain produced flash flooding near the community of Agoura Hills. At the intersection of Highway 101 and Kanan Road, several vehicles were stuck in flood waters.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 18:36:00 to 20-AUG-23 19:30:00 (PST-8)
Location: FILLMORE
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Near the community of Fillmore, the swift water rescue team initiated several rescues from the Santa Clara River.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 19:36:00 to 20-AUG-23 20:30:00 (PST-8)
Location: SATICOY
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Near the community of Saticoy, the swift water rescue team initiated several rescues from the Santa Clara River.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 22:29:00 to 20-AUG-23 23:45:00 (PST-8)
Location: PANORAMA CITY
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Near the community of San Fernando, five feet of mud covered several lanes of Interstate 5.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 23:07:00 to 21-AUG-23 00:30:00 (PST-8)
Location: GLENDORA
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Near the community of Azusa, a couple feet of mud covered the lanes of Highway 39.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 19:47:00 to 20-AUG-23 21:45:00 (PST-8)
Location: HAROLD
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Near the community of Palmdale, several homes reported significant flood damage.

Flash Flood in LOS ANGELES, CALIFORNIA
From 21-AUG-23 02:15:00 to 21-AUG-23 03:30:00 (PST-8)
Location: CITY TERRACE
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Near the community of Alhambra, flooding was reported at the connector of Interstate 10 and Interstate 710.

Flash Flood in LOS ANGELES, CALIFORNIA
From 21-AUG-23 04:14:00 to 21-AUG-23 06:30:00 (PST-8)
Location: EL NIDO
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud and debris flows were reported on Piuma Road near Malibu Canyon Road.

Funnel Cloud in SANTA BARBARA, CALIFORNIA
From 21-AUG-23 14:08:00 to 21-AUG-23 14:18:00 (PST-8)
Location: NEW CUYAMA ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A funnel cloud was observed west of the community of Cuyama.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 15:30:00 to 20-AUG-23 18:00:00 (PST-8)
Location: SEPULVEDA
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding in the community of San Fernando. On Interstate 405, numerous vehicles were stranded in the flooded roadway.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 15:19:00 to 20-AUG-23 18:00:00 (PST-8)
Location: AMBASSADOR
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding in the community of Culver City. On Interstate 10, numerous vehicles were stranded in the flooded roadway. Also, small streams overflowed their banks, flooding several backyards.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 16:08:00 to 20-AUG-23 18:00:00 (PST-8)
Location: VIRGINIA COLONY
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding in the community of Moorpark. On Moorpark Road, significant mud and debris flows were reported.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 11:35:00 to 20-AUG-23 13:30:00 (PST-8)
Location: RAYMER
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding in the community of Sherman Oaks. On Interstate 405, numerous vehicles were stranded on the flooded roadway.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 16:21:00 to 20-AUG-23 18:00:00 (PST-8)
Location: PALMDALE
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding in the community of Palmdale. At the intersection of Highway 114 and Avenue S, significant debris flows were reported.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 07:40:00 to 20-AUG-23 10:00:00 (PST-8)
Location: TUNNEL
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Santa Clarita. Significant flooding closed the truck bypass lanes on Interstate 5 and Highway 14.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 07:42:00 to 20-AUG-23 10:00:00 (PST-8)
Location: BALDWIN PARK
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of El Monte. Significant flooding impacted Interstate 10, stranding numerous vehicles.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 16:22:00 to 20-AUG-23 18:00:00 (PST-8)
Location: SPADRE
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Diamond Bar. Significant flooding was reported on Highway 57.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 13:06:00 to 20-AUG-23 15:00:00 (PST-8)
Location: CASTAIC JCT
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Castaic. Significant flooding was reported on the Old Road at Hillcrest Parkway.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 16:35:00 to 20-AUG-23 18:30:00 (PST-8)
Location: FILLMORE
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Fillmore. Significant flooding was reported on Highway 126.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 10:11:00 to 20-AUG-23 13:00:00 (PST-8)
Location: NEWHALL RANCH
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Valencia. Significant flooding was reported on Interstate 5 near Magic Mountain Parkway.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 17:01:00 to 20-AUG-23 19:00:00 (PST-8)
Location: NEWBURY PARK
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Newbury Park. Significant flooding was reported on Highway 101 near Ventu Park Road.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 17:02:00 to 20-AUG-23 19:00:00 (PST-8)
Location: LAS POSAS ESTATES
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Somis. Significant flooding was reported on Highway 118, near Aggen Road.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 17:18:00 to 20-AUG-23 19:15:00 (PST-8)
Location: CAMULOS
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Lake Los Angeles. Significant flooding was reported on Avenue P-8.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 17:23:00 to 20-AUG-23 19:30:00 (PST-8)
Location: DESERT VIEW HIGHLAND
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Quartz Hill. Significant flooding was reported on Highway 14 near Avenue M.

Flash Flood in VENTURA, CALIFORNIA
From 20-AUG-23 17:32:00 to 20-AUG-23 19:30:00 (PST-8)
Location: CAMARILLO ARPT
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Camarillo. Several vehicles were stuck in mud near the intersection of Trueno Road and Center School Road.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-AUG-23 17:55:00 to 20-AUG-23 19:30:00 (PST-8)
Location: PIRU
Flood cause: Heavy Rain / Tropical System
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain generated flash flooding near the community of Lake Hughes. Several cars were stuck in mud on Pine Canyon Road.