Exhibit 23.4 Consent of Independent Public Accountants To the Stockholders and Board of Directors of Public Service Company of Oklahoma: As independent public accountants, we hereby consent to the incorporation of our report with respect to the Consoldiated Financial Statements of Public Service Company of Oklahoma dated February 12, 1999, included in this Form 10-K, into Public Service Company of Oklahoma's previously filed registration statement on Form S-3 (File No. 333-00973). Arthur Andersen LLP Dallas, Texas March 10, 1999 4-23