By the end of the first week of September, the benefits from rains that fell during the latter part of August and the first week of September began to be felt.  A continued surge of deep tropical moisture, allowed for shower and thunderstorm activity to develop across portions of Deep South Texas and the Rio Grande Valley. The eastern sections of the region received between one and three inches of rain fall during early September, with the central and western counties averaging between one and two inches. A few isolated areas received heavier rains, especially over Cameron County. The shower and thunderstorm activity allowed for some improvements in areas where the heaviest rains occurred. Exceptional (D4) drought conditions covered most of Hidalgo County and extended into Starr, Jim Hogg, Brooks, and Willacy counties. The rest of the region was under Severe (D2) to Extreme (D3) drought conditions, with the exception of Zapata County, which was under Moderate (D1) to severe (D2) conditions.

Drought in CAMERON, TEXAS
From 01-SEP-13 00:00:00 to 09-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

Rain fell nearly every day during the first week of September across Cameron County.  Total accumulations varied across the county, the ASOS at the Brownsville/South Padre Island International Airport recorded 3.9 inches of rain, while the ASOS at Valley International Airport in Harlingen measured only 1.61 inches. Regardless, this beneficial rainfall allowed for improvement in drought conditions. The entirety of Cameron County improved to Extreme (D3) drought conditions, wiping away Exceptional (D4) drought conditions.

Drought in BROOKS, TEXAS
From 01-SEP-13 00:00:00 to 09-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

Despite some rain falling during the first week of September, little change was noticed in drought conditions across Brooks County. Much of the county remained engulfed in Extreme (D3) drought conditions, with southern quarter of the county covered in Exceptional (D4) drought conditions.

Drought in STARR, TEXAS
From 03-SEP-13 00:00:00 to 09-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

Exceptional (D4) drought conditions reigned over much of Starr County during the first week of September, with only the western third of the county experiencing Extreme (D3) drought conditions.

Drought in JIM HOGG, TEXAS
From 03-SEP-13 00:00:00 to 09-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

Much of Jim Hogg County during the first week of September was encompassed by Exceptional (D4) drought conditions that were painted from the SE corner through much of the middle of the county. The Exceptional (D4) drought conditions were surrounded by Extreme (D3) drought conditions and small slivers of Severe (D2) drought conditions on the far northern and western borders.

Drought in COASTAL WILLACY, TEXAS
From 01-SEP-13 00:00:00 to 16-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

Rain fell nearly every day across portions of Willacy County during the first half of September. Despite this rainfall little change was noted in drought conditions across coastal Willacy County, with the entire area engulfed in Extreme (D3) drought conditions.

Drought in COASTAL CAMERON, TEXAS
From 01-SEP-13 00:00:00 to 16-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

Rain fell almost every day across portions of coastal Cameron County. Despite this rainfall, little change was noted in drought conditions across coastal Cameron County, with the entire area engulfed in Extreme (D3) drought conditions.

Drought in ZAPATA, TEXAS
From 01-SEP-13 00:00:00 to 30-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

Little change in drought conditions occurred during much of the month across Zapata County. The western two thirds of the county remained in Moderate (D1) drought, while the eastern third maintained Severe (D2) drought conditions.

Drought in KENEDY, TEXAS
From 01-SEP-13 00:00:00 to 09-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

Extreme (D3) drought conditions prevailed across much of Kenedy County during the first week of September. The SW corner of the county was engulfed in Exceptional (D4) drought conditions.

Drought in HIDALGO, TEXAS
From 01-SEP-13 00:00:00 to 16-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

Some rain fell almost every day from the 1st through the 16th across portions of Hidalgo County. During the time period, the ASOS at McAllen Miller International Airport recorded 5.45 inches. Benefits from this rain would not be felt until later in the month. Exceptional (D4) drought conditions continued to engulf the county.

Drought in WILLACY, TEXAS
From 01-SEP-13 00:00:00 to 16-SEP-13 23:59:00 (CST-6)
Reported by: Drought Monitor

The benefits from showers and thunderstorms during the first half of September was felt little through the 16th of the month. Much of the county was engulfed by Extreme (D3) drought conditions. A swath of Exceptional (D4) drought conditions covered much of the western half of the county.