SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): AUGUST 14, 2002 ------------------------------ RELIANT ENERGY RESOURCES CORP. (Exact name of registrant as specified in its charter) DELAWARE 1-13265 76-0511406 (State or other jurisdiction (Commission File Number) (IRS Employer of incorporation) Identification No.) 1111 LOUISIANA HOUSTON, TEXAS 77002 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (713) 207-3000 ------------------------------

ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. (c) Exhibits. The following exhibits are filed herewith: 99.1 Certificate of Chief Executive Officer and Principal Financial Officer ITEM 9. REGULATION FD DISCLOSURE. In connection with the Quarterly Report on Form 10-Q for the quarterly period ending June 30, 2002, as filed with the Securities and Exchange Commission on August 14, 2002, Reliant Energy Resources Corp. filed as correspondence the certification attached hereto as Exhibit 99.1. The information in Item 9 of this report is being furnished, not filed, pursuant to Regulation FD. Accordingly, the information in Item 9 of this report will not be incorporated by reference into any registration statement filed by Reliant Energy Resources Corp. under the Securities Act of 1933, as amended, unless specifically identified therein as being incorporated therein by reference. 2

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. RELIANT ENERGY RESOURCES CORP. Date: August 14, 2002 By: /s/ R. Steve Letbetter ------------------------------ R. Steve Letbetter President and Chief Executive Officer 3

EXHIBIT INDEX EXHIBIT NUMBER EXHIBIT DESCRIPTION ------ ------------------- 99.1 Certificate of Chief Executive Officer and Principal Financial Officer 4

EXHIBIT 99.1 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 (SUBSECTIONS (a) AND (b) OF SECTION 1350, CHAPTER 63 OF TITLE 18, UNITED STATES CODE) Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code) (the "Act"), I, R. Steve Letbetter, President and Chief Executive Officer (and principal financial officer) of Reliant Energy Resources Corp. (the "Company"), hereby certify, to the best of my knowledge: (1) The Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2002 (the "Report"), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Dated: August 14, 2002 /s/ R. Steve Letbetter -------------------------------- R. Steve Letbetter President and Chief Executive Officer (and principal financial officer) The foregoing certification is being furnished solely pursuant to Section 906 of the Act and is not being filed as part of the Report or as a separate disclosure document.