• 2022 Summer readiness
• 2021 Summer readiness

Summer readiness

The California ISO is committed to keeping the public up-to-date on grid and market conditions during summer months, when extreme heat can cause energy supply shortages.

2023

System Conditions Bulletin - Aug 24, 2023

EDAM Forum Media Briefing - Aug 30, 2023

Summer Market Performance Report for Aug 2023

Summer Market Performance Report for July 2023

Summer Market Performance Report for June 2023

2023 Summer Loads and Resources Assessment

Summer Energy Reliability Outlook - Media Briefing - May 24, 2023   Recording | Presentation

California Energy Commission (CEC) Summer Reliability Workshop - May 17, 2023

Joint Agency Reliability Planning Assessment Second Quarterly Report - May 2023

2022

• Sep 9 - California ISO extends Flex Alert for today, 4-9 p.m.
• Sep 8 - Energy Emergency Alert 2 declared to protect grid
• Sep 8 - California ISO extends Flex Alert to today from 3-10 p.m
• Sep 7 - Energy Emergency Alert 2 declared to protect grid
• Sep 6 - Rotating power outages are now possible to protect grid
• Sep 6 - Consumers advised to be prepared for possible outages
• Sep 5 - Conditions on the grid becoming more strained as heat wave intensifies
• Sep 4 - California faces worsening grid challenges on Monday and Tuesday
• Sep 3 - Flex Alert extended to Sunday, Sept. 4 due to high heat
• Sep 2 - Flex Alert Issued for Tomorrow, Saturday, September 3
• Sep 2 - California faces several more days of heat and grid stress
• Sep 1 - Intensifying heat leads to another conservation call
• Sep 1 - Conservation helped reliability; another Flex Alert today
• Aug 31 - California ISO extends Flex Alert to Thursday, Sept. 1

• Sep 9 - Grid update from Elliot Mainzer, CEO & President
• Sep 9 - Media briefing
• Sep 8 - Grid update from Elliot Mainzer, CEO & President
• Sep 8 - Media briefing
• Sep 7 - Media briefing
• Sep 7 - Grid update from Elliot Mainzer, CEO & President
• Sep 6 - Grid update from Elliot Mainzer, CEO & President
• Sep 5 - Grid update from Elliot Mainzer, CEO & President
• Sep 4 - Grid update from Elliot Mainzer, CEO & President
• Sep 3 - Grid update from Elliot Mainzer, CEO & President
• Sep 2 - Grid update from Elliot Mainzer, CEO & President
• Sep 1 - Grid update from Elliot Mainzer, CEO & President
• Aug 31 - Flex Alert media statement from ​Mark Rothleder, COO & Senior Vice President
• Aug 30 - Labor Day weekend heat wave update from Elliot Mainzer, CEO & President

• California ISO adopts new grid emergency notifications
• Emergency notifications fact sheet
• Emergency notifications informational video
• CAISO AWE to NERC EEA training video

• Summer Market Performance Report for September 2022 - Heat Wave Analysis
• Summer Market Performance Report for August 2022
• Summer Market Performance Report for July 2022
• Summer Market Performance Report for June 2022
• Outage reports
• 2022 Summer Loads and Resources Assessment

• Reliability demand response resource bidding enhancements
• Adjustments to intertie constraint penalty prices
• WEIM resource sufficiency evaluation enhancements
• Transmission service and market scheduling priorities

Department of Energy issues order to access generation during electricity emergencies

California Energy Commission - Summer Reliability Media Briefings
   - June 9 Recording
   - May 6  Recording | Presentation

2021

Following the extreme heat wave of August 2020 and subsequent rotating power outages, the California ISO proactively worked with its partners and stakeholders to identify challenges and solutions for reliably decarbonizing the grid, and to raise public awareness about the electricity system needs.

A historic heat storm impacted the western US for several consecutive days in mid-August 2020, causing energy supply shortages that led to two rotating power outages in the ISO footprint on August 14 and 15. Since then, the California ISO — in coordination with state agencies and stakeholders throughout the state and the West — has embarked on a deep dive into the causes of the outages and the joint development of actions to be taken to prevent supply gaps in advance of summer 2021. This page is dedicated to providing easy access to data and reports related to the causes and the lessons learned from the August outages and provides a ‘one stop shop’ for all the activities, updates and identified improvements for ensuring grid reliability for summer 2021 and beyond.

Analysis of August 2020 outages

Detailed reports outline multiple causes of supply shortages and market impacts:

• Final Root Cause Analysis
• Preliminary Root Cause Analysis
• DMM Report on System and Market Conditions, Issues and Performance: August and September 2020
• California State Assembly Committee on Utilities and Energy 2020 Oversight / Informational Hearing

Planning for future heat waves

The California ISO has pledged to collaborate with the Governor’s Office, the state Legislature, state agencies, and stakeholders throughout the state and the West to deliver action items from the joint Preliminary Root Cause Analysis to mitigate impacts of a power grid under high stress conditions.

CEO’s Report to Board of Governors - Sep 22-23, 2021

CEO’s Report to Board of Governors - Jul 7, 2021

CEO’s Report to Board of Governors - May 19-20, 2021

CEO’s Report to Board of Governors - Mar 24-25, 2021

CEO’s Report to Board of Governors - Feb 3-4, 2021

CEO’s Report to Board of Governors - Dec 16-17, 2020

CEO’s Report to Board of Governors - Nov 18-19, 2020

Summer loads and resources assessment

The Summer Assessment uses historical and current data, statistical modeling, and simulations to give the expected energy supply conditions for the upcoming summer for the California ISO balancing authority.

Initiatives supporting 2021 summer readiness activities

Market enhancements for summer 2021 readiness – The purpose of this initiative is to focus on near-term efforts necessary to enhance market rules and procedures to help ensure grid reliability in summer 2021.

Training

Below are training sessions to help ISO stakeholders prepare for the 2021 summer release initiatives.

Apr 21, 2021  Resource Adequacy Enhancements Presentation | Video | Initiative
Apr 27, 2021  Summer 2021 Readiness Part 1 Presentation | Video
Apr 28, 2021  FERC 831 Presentation | Video | Initiative
Apr 29, 2021  Summer 2021 Readiness Part 2 Presentation | Video
Jun 24, 2021 Summer 2021 Readiness Part 3 Presentation | Video

2021 policy initiative roadmap process – Annual roadmap process is a comprehensive planning process for evolving the ISO markets. Policy development focused on addressing issues identified in the preliminary Root Cause Analysis such as resource adequacy reforms, scheduling priorities and improved market incentives during tight supply conditions.

Engagement opportunities

Public meetings provide stakeholders with an update on activities and an opportunity to engage in the summer readiness planning process.

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• 2021 Summer readiness update - Sep 24, 2021
• 2021 Summer readiness update - Aug 31, 2021
• 2021 Summer readiness update - Jul 29, 2021
• 2021 Summer readiness update - Jun 23, 2021
• 2021 Summer readiness update - May 26, 2021
• 2021 Summer readiness update - Apr 14, 2021
• 2021 Summer readiness update - Feb 25, 2021
• 2021 Summer readiness update - Jan 19, 2021
• DMM report on system and market conditions, issues and performance for Aug/Sep 2020 - Dec 18, 2020
• 2021 Summer readiness update - Dec 8, 2020

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Flex Alerts

A Flex Alert is a call for consumers to voluntarily conserve electricity when there is a predicted shortage of energy supply, especially if the grid operator needs to dip into reserves to cover demand. When consumers reduce electricity use at critical times, it can prevent more dire emergency measures, including possible power outages.

To prepare for summer 2021, and to better align Flex Alerts with current conditions, we will be developing several changes to the program, in coordination with the CPUC, utilities and others.

Visit FlexAlert.org for conservation tips, to subscribe for Flex Alerts and more.

Read about Flex Alerts

Resources

Background, fact sheets, and news releases related to 2020 heat waves

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• 

  Fact Sheet - CPUC-CEC-CAISO Summer Reliability Actions5/05/2021 08:36
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  2021 Summer Readiness Leadership Roundtable Update5/03/2021 13:27

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CPUC’s Summer 2021 Reliability webpage

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• Monthly progress report to the CA Assembly Committee on Utilities and Energy
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    Summer 2021 Reliability Monthly Report - Dec 21, 20211/12/2022 13:50
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    Summer 2021 Reliability Monthly Report - Nov 9, 202111/11/2021 11:01
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    Summer 2021 Reliability Monthly Report - Oct 8, 202110/11/2021 14:48
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    Summer 2021 Reliability Monthly Report - Sep 23, 202110/11/2021 14:48
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    Summer 2021 Reliability Monthly Report - Aug 16, 20218/17/2021 11:35
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    Summer 2021 Reliability Monthly Report - Jul 22, 20217/27/2021 10:37
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    Summer 2021 Reliability Monthly Report - Jun 10, 20216/11/2021 08:45
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    Summer 2021 Reliability Monthly Report - May 13, 20215/14/2021 09:24
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    Summer 2021 Reliability Monthly Report - Apr 7, 20214/07/2021 15:23
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    Summer 2021 Reliability Monthly Report - Mar 12, 20213/15/2021 14:10
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    Summer 2021 Reliability Monthly Report - Feb 3, 20212/17/2021 13:16
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    Summer 2021 Reliability Monthly Report - Jan 11, 20211/15/2021 15:14
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    Summer 2021 Reliability Monthly Report - Dec 1, 202012/08/2020 12:19

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• Outages - presentations and background

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• News releases
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    CAISO, CPUC, AND CEC Issue Preliminary Report on Causes of August Rotating Outages10/06/2020 15:38

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