Flex Alert Overview

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Historic Flex Alert Records

All time record peak demand - 50,270 megawatts, July 24, 2006

Did you know that conservation, teamwork and planning helped the California grid weather the historic heat wave of July 2006? Conservation helped the state achieve a conservation rate of at least 1,500 megawatts, which included general conservation, state water pump load reduction as well as a 25 percent reduction in power usage at state buildings.

Read the CAISO 08/01/06 press release (PDF).

Date

Location

Reason for Alert

Forecasted Peak Demand (MW)

Actual Peak Demand (MW)

Jul
25
2006

Statewide

Extended heat wave, high forecasted demand

50,221 MW

49,762 MW

Jul
24
2006

Statewide

Extended heat wave, high forecasted demand

52,336 MW

50,270 MW

Jul
23
2006

Statewide

Extended heat wave, high forecasted demand

44,000 MW

45,765 MW

Jul
22
2006

Statewide

Extended heat wave, high forecasted demand

44,000 MW

48,490 MW

Jul
21
2006

Statewide

Extended heat wave, high forecasted demand

47,087 MW

49,036 MW

Jul
19
2006

Statewide

Extended heat wave, high forecasted demand

46,604 MW

45,812 MW

Jul
18
2006

Statewide

Extended heat wave, high forecasted demand

47,049 MW

46,373 MW

Jul
17
2006

Statewide

Extended heat wave, high forecasted demand

46,499 MW

46,499 MW

Jul
16
2006

Statewide

Extended heat wave, high forecasted demand

42,000 MW

41,875 MW

Jul
15
2006

Statewide

Extended heat wave, high forecasted demand

42,000 MW

42,883 MW

Jul
14
2006

Statewide

Extended heat wave, high forecasted demand

46,283 MW

44,384 MW

Jun
28
2006

Statewide

Extended heat wave, high forecasted demand

41,950 MW

40,433 MW

Jun
27
2006

Statewide

Extended heat wave, high forecasted demand

43,741 MW

43,062 MW

Jun
26
2006

Statewide

Extended heat wave, high forecasted demand

45,907 MW

38,713 MW

Jun
25
2006

Statewide

Extended heat wave, high forecasted demand

44,000 MW

37,678 MW

Jun
24
2006

Statewide

Extended heat wave, high forecasted demand

40,000 MW

42,210 MW

Jun
23
2006

Statewide

Extended heat wave, high forecasted demand

44,000 MW

42,355 MW

Jun
22
2006

Statewide

Extended heat wave, high forecasted demand

42,300 MW

40,561 MW

Sep
29
2005

Southern California

Extended heat wave and high forecasted demand

39,150 MW at 4:00pm

39,725 MW at 4:00pm

Oct
14
2005

Southern California

Extended heat wave, unplanned outages and high forecasted demand

35,000 MW at 4:00-6:00pm (Southern California)

Jul
25
2005

Statewide

Extended heat wave and high forecasted demand

43,600 MW at 4:00pm (statewide)

43,500 MW at 4:00pm

Jul
24
2005

Statewide

Extended heat wave and high forecasted demand

41,900 MW at 5:00pm (statewide)

39,600 MW at 5:00pm

Jul
23
2005

Statewide

Extended heat wave and high forecasted demand

42,900 MW at 4:00pm (statewide)

40,600 MW at 5:00pm

Jul
22
2005

Statewide

Extended heat wave and high forecasted demand

45,800 MW at 4:00pm (statewide)

44,040 MW at 3:57pm

Jul
21
2005

Statewide

Heat wave and high forecasted demand

44,700 MW at 4:00pm (statewide)

44,651 MW at 3:0pm

Jul
18
2005

Statewide

Heat wave and high forecasted demand

46,000 MW at 4:00pm (statewide)

43,600 MW at 4:00pm

Jul
15
2005

Statewide

Extended heat wave and high forecasted demand

44,800 MW at 4:00pm (statewide)

42,800 MW at 4:00pm

Jul
14
2005

Statewide

Heat wave and high forecasted demand

46,182 MW at 4:00pm (statewide)

43,000 MW at 4:00pm

Sep
14
2004

Humboldt County

One generator tripped off line and a second unit was off line for maintenance.

38,040 MW at 4:00pm (statewide)

36,670 MW at 3:55pm

Sep
10
2004

Southern California

Hot temperatures and high demand

44,009 MW at 4:00pm (statewide)

44,231 MW at 3:50pm

Sep
8
2004

Statewide

Hot temperatures and high demand

45,097 MW at 4:00pm

45,597 MW at 4:00pm

Sep
7
2004

Santa Rosa Area

Damage to generation unit and transmission lines due to fire and hot temperatures

44,580 MW between 4:30-5:00pm (statewide)

45,165 MW at 4:00pm

Sep
6
2004

Santa Rosa Area

Damage to generation unit and transmission lines due to fire and hot temperatures

39,813 MW between 4:30-5:00pm (statewide)

39,874 MW at 4:31pm

Aug
11
2004

Statewide

Heat wave and high forecasted demand

46,020 MW between 4:30-5:00 p.m.

44,872 MW at 4:20pm

Aug
10
2004

Statewide

Heat wave and high forecasted demand

45,988 MW between 4:30-5:30pm

44,497 MW at 4:41pm

Aug
9
2004

Statewide

Heat wave and high forecasted demand

44,700 MW between 4:30-5:30pm

42,997 MW at 3:57pm

Jul
26
2004

Statewide

Heat wave and high forecasted demand.

46,252 MW around 5 pm

42,326 MW at 3:58pm