UNITED STATES 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) May 4, 1999 SOUTHWEST GAS CORPORATION (Exact name of registrant as specified in its charter) California 1-7850 88-0085720 (State or other jurisdiction of (Commission (I.R.S. Employer incorporation or organization) File Number) Identification No.) 5241 Spring Mountain Road Post Office Box 98510 Las Vegas, Nevada 89193-8510 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (702) 876-7237 Item 5. Other Events On May 4, 1999, Southwest Gas Corporation (the Company) released summary financial information to the general public, including the investment community, regarding the Company's operating performance and financial position for the quarter ended March 31, 1999. The financial information released is included herein. This information is summary in nature and should not be considered complete financial statements. Item 7. Exhibits 99 Financial Analyst Report - First Quarter 1999 SIGNATURES 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. SOUTHWEST GAS CORPORATION Date: May 4, 1999 /s/ EDWARD A. JANOV ----------------------------- Edward A. Janov Vice President/Controller and Chief Accounting Officer