EXHIBIT 12.1 CENTRAL POWER AND LIGHT COMPANY (CONSOLIDATED) RATIO OF EARNINGS TO FIXED CHARGES FOR THE TWELVE MONTHS ENDED SEPTEMBER 30, 1997 (Thousands Except Ratio) (Unaudited) Operating Income $ 251,943 Adjustments: Income taxes 59,982 Provision for deferred income taxes 23,458 Deferred investment tax credits (4,728) Other income and deductions 3,359 Allowance for borrowed and equity funds used during construction 3,728 -------- Earnings $ 337,742 ======== Fixed Charges: Interest on long-term debt $ 108,286 Interest on short-term debt and other 20,536 -------- Fixed Charges $ 128,822 ======== Ratio of Earnings to Fixed Charges 2.62 ========