Early on the morning of July 9th, multiple rounds of storms associated with a slow-moving low pressure system developed and streamed northward across Cameron County. The repeated rounds of storms dropped 4 to more than 6 inches of rain in a 2 to 3 hour span across the Brownsville-Los Fresnos area, leading to many instances of flash flooding. Minor flooding was noted farther east in Port Isabel and South Padre Island.

Flash Flood in CAMERON, TEXAS
From 09-JUL-21 04:30:00 to 09-JUL-21 06:00:00 (CST-6)
Location: LOS FRESNOS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Los Fresnos Police Department reported more than 10 streets in the city were experiencing flooding. Floodwaters were rising over curbs and spilling into sidewalks at the time of the report.

Flash Flood in CAMERON, TEXAS
From 09-JUL-21 04:30:00 to 09-JUL-21 06:00:00 (CST-6)
Location: BROWNSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Brownsville Police reported that about 30 streets in the city were experiencing flooding. Floodwaters were deep enough to prevent cars from traveling through.

Flash Flood in CAMERON, TEXAS
From 09-JUL-21 04:45:00 to 09-JUL-21 06:15:00 (CST-6)
Location: MAUDLIN ARPT
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Reports received via social media of flooding along Frontage Road near the Sunrise Mall in Brownsville, with floodwaters reaching up to the headlights of cars. Additional flooding was also noted on FM 802/Ruben Torres Boulevard.

Flash Flood in CAMERON, TEXAS
From 09-JUL-21 06:30:00 to 09-JUL-21 08:00:00 (CST-6)
Location: MAUDLIN ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reports received via public of resacas (oxbow lakes) near Valley International Country Club were overflowing onto parts of FM 802.

Flash Flood in CAMERON, TEXAS
From 09-JUL-21 06:30:00 to 09-JUL-21 08:00:00 (CST-6)
Location: PORTWAY ACRES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reports received via social media showed several streets near UTRGV Brownsville Campus were flooded, and portions of the campus were without power due to lightning strikes and/or flooding.

Flash Flood in CAMERON, TEXAS
From 09-JUL-21 07:30:00 to 09-JUL-21 09:00:00 (CST-6)
Location: OLMITO
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Reports received via social media of water rising halfway up wheels on vehicles as well as a few stalled cars in Olmito Estates.

Flash Flood in CAMERON, TEXAS
From 09-JUL-21 07:45:00 to 09-JUL-21 09:15:00 (CST-6)
Location: BROWNSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Pictures received via social media of flooding estimated at 2 to 3 feet of water depth at Old Alice Road and Price Road in Brownsville, with water nearing gas pumps and buildings. This location is a flood-prone area which has seen several similar events since 2010.

Flood in CAMERON, TEXAS
From 09-JUL-21 05:00:00 to 09-JUL-21 06:30:00 (CST-6)
Location: LOS FRESNOS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Cameron County Sheriff's Department reported FM 2480 between Bayview and Los Fresnos was flooded, with up to 1 foot of water covering the westbound lane.

Flood in CAMERON, TEXAS
From 09-JUL-21 07:30:00 to 09-JUL-21 09:00:00 (CST-6)
Location: PORT ISABEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reports received via social media of Marina Drive in Port Isabel covered with several inches of water.

Flood in CAMERON, TEXAS
From 09-JUL-21 08:45:00 to 09-JUL-21 10:15:00 (CST-6)
Location: ARROYO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Video received via social media of water covering several streets and intersections in the Arroyo Colorado Estates area. Water depth was estimated at 12 to 18 inches.

Flood in CAMERON, TEXAS
From 09-JUL-21 08:00:00 to 09-JUL-21 09:30:00 (CST-6)
Location: PORT ISABEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Video received via social media showing several portions of Padre Island Boulevard covered with water along with numerous side streets also experiencing flooding.

Flash Flood in CAMERON, TEXAS
From 09-JUL-21 06:00:00 to 09-JUL-21 09:00:00 (CST-6)
Location: EVAN
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Employee

An off-duty NWS employee reported  2 to 3 feet of water flooding multiple roads in north Brownsville, including Morrison at Stagecoach; a neighborhood between Alton Gloor and east Morrison Blvd.; and a section along Dennet Road east of the Woods' End neighborhood.  Several cars had water above their wheels, stalled in the floodwaters.  This area had last seen similar flooding on June 19 and 20, 2018.