HOUSTON, Sept. 25 /PRNewswire-FirstCall/ -- All Prosperity Bank(R) locations along the Gulf Coast will resume operations on Monday, September 26, 2005 following the coastal evacuation last week in advance of Hurricane Rita. "I am very pleased to report that our contingency planning and disaster recovery teams have functioned appropriately. As a result, we did not experience any interruption in our critical systems, communications and data support," stated David Zalman, Chief Executive Officer. Prosperity Bank(R) closed 65 banking centers along the gulf coast on Thursday, September 22, 2005 as Hurricane Rita approached the Texas coast. Ten banking centers in the Corpus Christi area reopened on Friday as the storm track turned to the north. All 55 banking centers that were closed on Friday are expected to reopen on Monday, September 26, 2005. As of Sunday afternoon, six Prosperity Bank(R) locations were without power. All six of these locations are expected to reopen on Monday with limited services. Prosperity Bancshares, Inc.(R) Prosperity Bancshares(R), a $3.4 billion Houston, Texas based regional financial holding company, formed in 1983, was named to the Keefe Bruyette & Woods, Inc. 2005 Honor Roll for achieving exceptional earnings per share growth for the past 10 years. Other recent honors include being named to the Sandler O'Neill & Partners 2005 Bank and Thrift Small All Stars, and the Houston Chronicle's Houston 100 list. Operating under a community banking philosophy, Prosperity seeks to develop broad customer relationships based on service and convenience. Prosperity offers a variety of traditional loan and deposit products to its customers, which consist primarily of consumers and small and medium sized businesses. In addition to established banking products, Prosperity offers a complete line of services including: Internet Banking services at http://www.prosperitybanktx.com/, Retail Brokerage Services, MasterMoney Debit Cards, and 24 hour voice response banking. Prosperity currently operates eighty-five (85) full service banking locations, thirty-three (33) in the Houston CMSA; sixteen (16) in the Corpus Christi area; eleven (11) in the Dallas area; seven (7) in the Austin area; and eighteen (18) in fifteen contiguous counties south and southwest of Houston generally along the NAFTA highway. Prosperity Bank(R) operates the following full service banking centers: Austin Area - Corpus Christi Downtown West Columbia Allandale Area - Fairfield Winnie Congress Airline Gladebrook Lakeway Alameda Heights Oak Hill Carmel Highway 6 South Texas Area - Research Blvd Everhart Holcombe Bay City Riverside Northwest Medical Center Beeville William Cannon Saratoga Memorial Cuero Water Street Midtown East Bernard Woodlawn Post Oak Edna Dallas Area - Alice River Oaks El Campo Abrams Centre Aransas Pass Tanglewood Goliad Camp Wisdom Kingsville Waugh Drive Gonzales Kiest Mathis Westheimer Hallettsville Preston Road Port Aransas Woodcreek Palacios Turtle Creek Portland Angleton Port Lavaca Westmoreland Rockport Clear Lake Seguin Blooming Grove Sinton Cleveland Victoria Cedar Hill Dayton Victoria - Navarro Corsicana Galveston Victoria - North Ennis Houston Area - Hitchcock Wharton Red Oak Aldine Liberty Yoakum Bellaire Magnolia Yorktown City West Mont Belvieu Copperfield Needville Cypress Sweeny "Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: This release contains, and the remarks by our management on the conference call may contain, forward-looking statements within the meaning of the securities laws that are based on current expectations, assumptions' estimates and projections about Prosperity Bancshares(R), and its subsidiaries. These forward-looking statements are not guarantees of future performance and are subject to risks and uncertainties, many of which are outside of Prosperity's control, that may cause actual results to differ materially from those expressed or implied by the forward-looking statements. These risks and uncertainties include whether we can: continue to sustain our current internal growth rate or our total growth rate; successfully close and integrate acquisitions; continue to provide products and services that appeal to our customers; continue to have access to the debt and equity capital we need to sustain our growth; and achieve our sales objectives. Other risks include the possibility that credit quality could deteriorate; actions of competitors; changes in laws and regulations (including changes in governmental interpretations of regulations and changes in accounting standards); customer and consumer demand, including customer and consumer response to marketing; effectiveness of spending, investments or programs; fluctuations in the cost and availability of supply chain resources; economic conditions, including currency rate fluctuations and interest rate fluctuations; weather; and the stock price volatility associated with "small- cap" companies. These and various other factors are discussed in our most recent Annual Report on Form 10-K and other reports and statements we have filed with the SEC. Copies of Prosperity Bancshares's (R) SEC filings may be downloaded from the Internet at no charge from http://www.prosperitybanktx.com/. DATASOURCE: Prosperity Bancshares, Inc. CONTACT: Dan Rollins, President of Prosperity Bank, +1-713-693-9300, Web site: http://www.prosperitybanktx.com/

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