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March 16, 2026

CAISO/WEIM

The California Independent System Operator serves about 80% of California's electricity demand, including the service areas of the state's three investor-owned utilities. It also operates the Western Energy Imbalance Market, an interstate real-time market covering territory that accounts for 80% of the load in the Western Interconnection.
CPUC Proposes Adding 11.5 GW of New Resources
The CPUC proposed requiring electric providers to procure 11.5 GW of new resources between 2023 and 2026 to meet the state’s reliability needs.
Orders Signal Wind-down of Western Energy Crisis Disputes
FERC issued a set of orders signaling the disputes around the Western energy crisis of 2000/01 might finally be winding down.
FERC Summer Assessment Spotlights Western Drought Risks
Extreme heat and drought conditions are a major cause for concern in the Western Interconnection, according to FERC’s summer assessment.
Western Drought Increases Wildfire Risks
Utility wildfire experts told WECC that another expected year of hot, dry weather will increase the danger of major fires in the West.
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CAISO Launches 20-year Transmission Planning Process
CAISO kicked off an extended 20-year transmission planning process to support the state’s clean energy goals.
CAISO Could See More Outages this Summer
California could experience capacity shortfalls this summer during severe heat because of limited imports and low hydroelectric production, CAISO said.
CREPC-WIRAB Takes Stock of Western Resource Adequacy
Western states must work more closely to prevent capacity shortfalls and the type of energy crisis that roiled the region 20 years ago.
CAISO Board Approves EIM Governance Changes
CAISO and the EIM Governing Body approved changes to the EIM’s governance structure involving the selection of body members and stakeholder engagement.
CAISO Readies for Storage Scale-up
CAISO has launched a new stakeholder initiative to foster the connection of large amounts of energy storage in the coming years.
Joint CAISO-EIM Authority Debated in West
Supporters and skeptics of a plan to give the EIM’s Governing Body more joint authority with CAISO over changes to the market debated the matter.

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