Press Releases

LAS VEGAS, Feb. 23 /PRNewswire-FirstCall/ -- Senior management of Southwest Gas Corporation (NYSE: SWX) is holding a conference call to discuss Southwest's 2006 fourth quarter and year-end results on Tuesday, March 6, 2007.

The conference call will follow the release of Southwest's earnings results on Tuesday, February 27, 2007.

The call will also be webcast live on Southwest's website at
www.swgas.com.

DATE: TUESDAY, MARCH 6, 2007
TIME: 10:00 A.M. (PST)
Telephone number: 800-282-9233
PIN code: 1234

A digital replay of the call can be accessed approximately one hour following the call by dialing 800-756-3819; passcode: 222000. The replay and webcast will be available through the close of business on Friday, March 16, 2007.

(Southwest Gas recommends the free download of Windows Media(R) Player 10 Series found at http://www.microsoft.com/windows/windowsmedia/default.aspx and at least a 56 kbps connection to the Internet. If you have "pop-up" blocking software installed, please press the CTRL key when you click the Register button. Please contact your network operations group if you are unable to override this feature.)

SOURCE Southwest Gas Corporation
-0- 02/23/2007
/CONTACT: Shareholders, Ken Kenny of Southwest Gas Corporation,
+1-702-876-7237/
/Web site: http://www.swgas.com /
(SWX)

CO: Southwest Gas Corporation
ST: Nevada
IN: OIL
SU: CCA MAV

SF-MH
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0834 02/23/2007 17:00 EST http://www.prnewswire.com