Today's Energy Usage = Third Record in Eight Days; Continued Conservation Needed Tuesday, PowerWatch Extended

Business Wire, July 25, 2006

FOLSOM, Calif. -- The California Independent System Operator (California ISO) continues to deal with record electricity usage -- the amount of growth forecast to appear five years from now. Today, July 24, 2006 another record peak was set at 50,270 megawatts at 2:44 pm. This breaks the record of 49,036 megawatts set just last Friday, July 21. Stage One and Two Emergencies were called today in order to meet this record demand.

Conservation is making a difference and the California ISO would like to thank consumers as well as participants of the ISO Voluntary Load Reduction Program and the utilities' Interruptible customers -- all of which contributed greatly to today's ability to keep the lights on.

24-Hour Ahead Outlook for Tuesday, July 25
              ------------------------------------------
               California ISO Continues Power Watch Day

    Temperatures statewide are expected to decrease slightly as a
high-pressure system sitting over the Western region begins to move
out. The build up of residual heat, from more than a week of high
temperatures, is great and tomorrow's demand for energy is expected to
be high again.

    -- Stage 1: Likely Stage   2: Possible Stage   3: Unlikely

      -- Forecast peak demand: 50,547 megawatts around 4:00 p.m.

Please monitor the California ISO website at www.caiso.com for updated information about the electricity supply. The Systems Condition page provides the current demand on the Grid and an hour-by-hour forecast of the day's electrical surplus/shortfall is available in Today's Outlook.

This advisory is based on the best data available at the time of its release. Grid conditions can change rapidly and are subject to change without warning. This forecast is accepted by the recipient on the condition that errors, omissions and/or changes to the contents shall not be made the basis for any claim, demand or cause of action against the California ISO.

Stage 1 Emergency
                           -----------------
                        Consumers are urged to
                          reduce their use of
                      electricity voluntarily to
                       avoid severe conditions.

                           Stage 2 Emergency
                           -----------------
                       Voluntary interruption of
                      service to select customers
                       is possible to avoid more
                          severe conditions.

                           Stage 3 Emergency
                           -----------------
                         Consumers are advised
                    that involuntary interruptions
                       of service have begun and
                        will continue until the
                         emergency has passed.

                            Powerful Habits
                            ---------------
               -- Set thermostat at 82 degrees or higher
                           -- Cool with fans
                          -- Draw the drapes
             -- Turn off unnecessary lights and appliances
        -- Use big appliances in early morning or late at night