Power Out Map
– 0% of Napa out 0 customers out in California

Power outage history

Napa County California

22hours

without power for the average customer in a typical year, 2018–2025

17th most of 56 in California 3.3× the national median

Worst outage on record Sep 28, 2020 17% of customers out · 90% back in 19.3 days
Hours without power, average customer per year 22h / yr State average 6.2 h · national median 6.6 h
Major outages a year 2.5 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 22hours Median across major outages, from the peak
Longest single outage 26.5days Sep 27, 2020, over 1% of customers out
Outage hours on storm days 30% Share falling on days with a NOAA storm report here
Worst year 2020 2.3 days without power, average customer
Electricity customers 63,828 ORNL customer model · 8 well-covered years

Every day since 2015

Eleven years, one night at a time

Each cell is a day. The brighter it is, the larger the share of Napa's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025
0%100% of customers out

Year by year

Hours in the dark, per customer

2020 was the worst well-recorded year, at 2.3 days for the average customer. Hatched years have a thin record and are left out of the averages.

Napa, hours without power per customer

NapaUS median countyCalifornia average
0 20 40 60 80 ’17 5.1 ’18 54 ’19 56 ’20 11 ’21 8.6 ’22 12 ’23 22 ’24 5.6 ’25 US 6.6 CA 6.2

The record

The biggest outages since 2015

Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.

Began Storm Peak out Share Lasted 90% restored Customer-hours
Sep 27, 2020 No storm report 10,657 17% 26.5 d 19.3 d 1.9M
Oct 26, 2019 Windstorm 31,090 49% 5.1 d 2.3 d 1.3M
Aug 18, 2020 No storm report 4,583 7% 15.2 d 13.0 d 594k
Feb 4, 2024 Windstorm 12,733 20% 4.0 d 2.5 d 512k
Oct 9, 2019 No storm report 45,759 72% 11 h 18 h 466k
Oct 25, 2020 Windstorm 13,181 21% 2.3 d 40 h 446k
Oct 10, 2019 No storm report 46,279 73% 29 h 23 h 414k
Oct 9, 2019 No storm report 45,473 71% 11 h 17 h 302k
Nov 20, 2019 No storm report 11,896 19% 33 h 24 h 281k
Nov 5, 2024 No storm report 7,939 12% 46 h 35 h 211k
Oct 17, 2024 No storm report 5,300 8% 2.8 d 41 h 191k
Feb 23, 2023 No storm report 6,591 10% 3.8 d 2.8 d 184k

After the peak

How fast the lights come back

Each line is one major outage, from its peak. The amber line is the typical path.

0% 25% 50% 75% 100% peak+24h+48h+72h+96h half back by +28h 90% by +42h

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

00061218 Jan inside

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Napa from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • No storm on record 70%
  • Windstorm 27%
  • Heat 2.5%

Who keeps the lights on

Utilities serving Napa

As each utility reports to the Energy Information Administration for its whole California territory, not this county alone. Outage minutes include major storm days.

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Pacific Gas & Electric Co. Investor Owned 273 208 1.63 37.5 5.1M

EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.

Next door

Neighbouring counties

Across California

Where it is darkest

Hours / yr64+

All California counties →

About these numbers

Notes

Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 63,828 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →