CAISO grid emergencies this year
How many days CAISO has been under a capacity alert, warning or emergency this year, which days they were, how far up the ladder each went, and what is in effect now.
CAISO grid emergencies this year
How many days CAISO has been under a capacity alert, warning or emergency this year, which days they were, how far up the ladder each went, and what is in effect now.
CAISO capacity emergency days since Sep 9
In effect now
Restricted Maintenance Operations
Since Oct 6, 2026, 10:00 AM PDT
EEA days since Sep 9
0
NERC Energy Emergency Alert, any level
Warning or emergency days since Sep 9
0
4 days with any capacity alert · 3 covered all of CAISO
Ask the Grid's record of CAISO's postings begins Sep 9, 2026; earlier days this year are not counted.
Days with a capacity declaration since Sep 9
- Wed, Sep 9Alert
- Thu, Sep 10Alert
- Mon, Oct 5Alert
- Tue, Oct 6Alert
Days since Sep 9, by level
| Alert or higher | 4 |
| Warning or higher | 0 |
| Emergency action or higher | 0 |
| Load shed or higher |
What this shows
CAISO's ladder
CAISO starts with Restricted Maintenance Operations, which asks generators and transmission owners to postpone maintenance, then an EEA Watch, then Energy Emergency Alert levels 1 to 3. Flex Alerts ask the public to conserve alongside them.
How the days are counted
A day counts when a capacity declaration at alert or above covers any part of it, in the market's own time zone, whether it covered the whole footprint or one region. Each day takes the highest step and NERC EEA level declared that day, and overlapping or renewed postings count once. Drills are never counted.
One ladder across markets
Every operator names its steps differently. Ask the Grid places each on one ladder, advisory, alert, warning, emergency action and load shed, with the NERC EEA level the operator states or its procedure defines, so a day here means the same thing in every market.
What people ask
Has CAISO declared an Energy Emergency Alert this year?
The EEA counts at the top of this page say, with each day it was declared. They come from CAISO's own postings and update within minutes of a new one.
What is the difference between an alert, a warning and an emergency?
An alert says supply may be tight ahead of time. A warning says reserves are short or about to be. An emergency action means the operator is already using emergency resources, and load shed means it is cutting load to protect the grid.
Why count a declaration that covered only part of the market?
A balancing area or region under an EEA is the market under an emergency there. The page shows how many days covered the whole footprint separately, and marks each declaration with where it applied.
Sources
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