A statewide Flex Alert, a call for voluntary electricity conservation, was in effect until 9 p.m., but no rolling power outages occurred Wednesday evening.

The Flex Alert took effect at 2 p.m., one hour earlier than other days this week. But by late afternoon, the California Independent System Operator, which manages the state’s power grid, announced that conservation efforts had paid off, and no rolling outages were needed.

ISO also credited imported energy and increased wind production as reasons outages were avoided.

Rolling blackouts were averted Tuesday, also thanks to conservation by consumers, imported energy and power from wind plants, according to Cal-ISO.

A Stage 2 Emergency was declared around 2 p.m. Tuesday by the grid operator, which was preparing to order load shed to take the strain off the grid. However, demand came in lower than forecast and the emergency was canceled at 7:37 p.m.

“Californians made tonight a success,” said Steve Berberich, president and CEO of Cal-ISO. “Everyone pulled together and responded to our warning with action to avoid any interruption in electricity supplies.”

California’s record-breaking heat wave has put strain on the ISO electric system since Friday as air conditioners pushed up electricity demand.

Residents were asked to use air conditioning early in the day and set thermostats no lower than 78 in the afternoon and evening hours, while avoiding the use of major appliances during the Flex Alert hours.

Officials also urged businesses statewide to restrict their usage. In some cases, the state is asking business owners to support outreach to their customers about conserving energy.

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