ENMAX Acquisition Corp., an indirect wholly-owned subsidiary of ENMAX Corporation, today announced that it is further extending the previously announced offer dated March 10, 2008, as varied by notices of extension dated April 15, 2008 and April 29, 2008, to purchase all of the issued and outstanding shares of Cordero Energy Inc. ("Cordero") (TSX: COR) until 4:30 p.m. (MST) on May 27, 2008. A notice of extension will be mailed to Cordero's shareholders.

Copies of the notice of extension (in both English and French) have been filed with various securities regulatory authorities in Canada and are available on the SEDAR website (www.SEDAR.com) under Cordero’s profile.

About ENMAX
ENMAX Corporation and its predecessors have provided Albertans with safe, reliable electricity for more than 100 years. Through its subsidiaries, ENMAX provides electricity, natural gas, renewable energy and value-added services to more than 500,000 residential, commercial and institutional customers in Alberta. ENMAX Energy Corporation contracts low-cost reliable electricity from the Keephills and Battle River facilities and meets peak demand through a long term agreement for the Calgary Energy Centre. ENMAX, through a subsidiary, is one of Alberta’s largest investors in renewable energy with 100 per cent ownership of the Taber Wind Farm and 50 per cent ownership of the McBride Lake Wind Farm. ENMAX Energy has the largest green power marketing program of its kind in Canada. For more information, visit our website at enmax.com.

THE TORONTO STOCK EXCHANGE HAS NOT REVIEWED AND DOES NOT ACCEPT RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS RELEASE.