Exhibit 16 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 May 30, 2002 Dear Sir or Madam: We have read the first through fourth paragraphs of Item 4 included in the Form 8-K dated May 30, 2002, of Western Resources, Inc. to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ Arthur Andersen LLP Arthur Andersen LLP Copy to: Mr. Paul R. Geist, Western Resources, Inc.