OutageCost.org loss ledger · 12 Oct 2024 to 12 Oct 2026 · 730 days Estimates labelled

Two years of data center losses: $4.1B. Microsoft earns that in 11 days.

We added up the 25 most expensive data center losses of the past two years: cloud outages, battery fires, and, new this year, missiles and drones. The total runs from $2.6B to $5.6B, with a midpoint of $4.1B. That is 11 days of Microsoft's profit, 11 days of Alphabet's and 12.5 days of NVIDIA's. For most of the world it is far larger: more than five Pacific nations' yearly economies combined, and close to Fiji's.

$4.1BMidpoint of 25 events. Range $2.6B to $5.6B.

$5.6MLost per day, on average, for 730 days. About $235,000 an hour.

$254M–$760MLast 30 days alone. Every dollar of it from war.

$0.9B–$1.2BThe part backed by a published figure. The rest is estimated.

In Big Tech terms

Two years of losses, earned back in under three weeks

Days of net income each company needs to cover the two-year loss, using its latest full fiscal year. Solid bar: the low estimate. Pale bar: up to the high estimate. Scale: 0 to 20 days.

MicrosoftFY2026 net income $133.7B

11.2 days

Alphabet2025 net income $132.2B

11.4 days

NVIDIAFY2026 net income $120.1B

12.5 days

05101520 days

Under 4 days of Alphabet sales

Counting revenue instead of profit, Alphabet takes about 90 hours to bring in $4.1B, Microsoft about 109 hours and NVIDIA about 167.

8 days of NVIDIA data center revenue

NVIDIA's data center segment alone brought in $193.7B in fiscal 2026. At that pace it covers the two-year loss in about 7.8 days.

A month of war, a day and a half

The last 30 days of war damage, midpoint about $507M, equals roughly a day and a half of profit for any of the three.

In countries

The two-year bill, measured in national economies

Each grey bar is a country's entire output for one year. The red bar is the data center loss. The pale part of the red bar is the gap between our low and high estimates.

Data center losses25 events, 730 days

$2.6B–$5.6B

Fijione year of GDP

$5.4B

Seychellesone year of GDP

$2.1B

Five Pacific nationsTuvalu, Nauru, Kiribati, Tonga, Samoa

$1.9B

Tongaone year of GDP

$500M

Last 30 days of losseswar only

$254M–$760M

$0$1B$2B$3B$4B$5B$6B

Five nations, combined

Even the low estimate, $2.6B, beats the yearly GDP of Tuvalu, Nauru, Kiribati, Tonga and Samoa added together, about $1.9B.

One Tuvalu every 11 days

At $5.6M a day, the losses matched Tuvalu's entire yearly economy, about $62M, every 11 days for two years.

A Tonga in a month

The last 30 days of war damage, midpoint about $507M, is roughly one year of Tonga's economy, about $500M.

By cause

War overtook outages as the largest single cause

War$1.3B–$3.5B · 11

Outage$1.2B–$1.9B · 10

Fire$146M–$240M · 4

Solid bar: low estimate. Thin line: up to the high estimate. Scale runs to $3.5B.

“War now destroys cloud regions outright. AWS lost a whole region and part of another, with permanent customer data loss.”
From the compiled case notes

The categories count different things. Outage figures are mostly losses to customers during hours of downtime. War and fire figures are mostly destroyed buildings and equipment, and the customer losses from those events are largely unknown. So the war share is probably understated, not overstated.

Over time

Twenty-five losses, October 2024 to October 2026

Outage War Fire Circle area = midpoint cost

In their words

What the cases say

“Customer data held only there is permanently lost.”
AWS Bahrain and UAE, status as of 15 September 2026

“Multi-zone design did not survive missiles and drones hitting zones in the same metro area.”
Pattern across the AWS Middle East cases

“Backups decided who survived.” Parkovyi and Datagroup clients kept their data through EU and backup sites. NIRS and Matrix Cellular lost theirs.
Pattern across war and fire cases

“Lithium-ion battery rooms caused three of the four fires.”
NIRS Korea, X in Hillsboro, and reportedly New Delhi

“Insurance mostly will not pay for war.” War exclusions push the cost onto operators and customers.
Pattern across war cases

Replacing the damaged Yandex equipment will take about six months, bought on the most expensive market in years because of sanctions.
Kommersant sources, via Meduza, 12 October 2026

The ledger

All 25 events

Highlighted rows fall in the last 30 days. Basis: P published by an insurer, analyst, company or government; E our estimate; P+E a published partial figure plus an estimate.

#	Event	Type	Date	Cost (USD)	Counts	Basis
1	AWS Bahrain region (me-south-1) lost to Iranian drone strikes	War	Mar to Jul 2026	$600M to $1.5B	Assets + credits	P+E
2	AWS UAE region, two facilities struck, one zone lost	War	1 Mar 2026	$400M to $1.2B	Assets + credits	P+E
3	AWS us-east-1 DynamoDB DNS failure	Outage	20 Oct 2025	$500M to $650M	US company losses	P
4	Microsoft Azure Front Door	Outage	29 Oct 2025	$250M to $500M	Customer losses	E
5	Cloudflare global outage	Outage	18 Nov 2025	$250M to $360M	Customer losses	P
6	Google Cloud Service Control crash	Outage	12 Jun 2025	$100M to $250M	Customer losses	E
7	Yandex Sasovo data center, drone strike and fire	War	8 Oct 2026	$100M to $250M	Assets	E
8	Yandex Vladimir data center (ru-central1-a), drone strike	War	11 Oct 2026	$75M to $200M	Assets	E
9	Yandex Kaluga data center, modules destroyed	War	9 Oct 2026	$50M to $200M	Assets	E
10	South Korea NIRS government data center battery fire	Fire	26 Sep 2025	about $115M	Recovery budget + damage	P
11	STT GDC and Tata Delhi fire, Google Cloud India hit	Fire	5 Jun 2026	$20M to $80M	Assets + customer losses	P+E
12	PlayStation Network outage, about 24 hours	Outage	7 to 8 Feb 2025	$20M to $60M	Compensation + lost sales	E
13	AWS us-east-1 cooling failure in one data hall	Outage	7 May 2026	$25M to $50M	Customer losses	E
14	Parkovyi data center, Kyiv, destroyed by Russian strikes	War	23 Sep to 1 Oct 2026	$15M to $40M	Assets	E
15	Alaska Airlines primary data center failure	Outage	23 Oct 2025	about $26M	Company pretax income	P
16	NorthC Almere fire, IBM Cloud Amsterdam offline six days	Fire	7 May 2026	$10M to $40M	Assets + customer losses	E
17	De Novo data center, Kyiv, Russian strike	War	19 Sep 2026	$5M to $30M	Assets	E
18	Alaska Airlines data center hardware failure	Outage	20 Jul 2025	$12M to $17M	Company earnings	P
19	Other Kyiv strikes: UTELS, Fex.net, BeMobile, UCloud, Kyivstar	War	Sep 2026	$5M to $20M	Assets	E
20	Barclays UK mainframe outage	Outage	31 Jan to 2 Feb 2025	$6.5M to $9.7M	Compensation only	P
21	CME Group halt, CyrusOne CHI1 cooling failure	Outage	27 to 28 Nov 2025	$3M to $10M	Lost exchange fees	E
22	Sharif University HPC data center, Tehran, strike	War	6 Apr 2026	$3M to $10M	Assets	E
23	MiroHost and CityHost equipment destroyed, Kyiv	War	24 Sep 2026	$2M to $10M	Assets	E
24	Datagroup data center, Kyiv, Russian strike	War	25 Sep 2026	$2M to $10M	Assets	E
25	X data center fire, Hillsboro, Oregon	Fire	22 May 2025	$1M to $5M	Equipment + outage	P+E

Method

How the numbers were built

Totals

Range: the sum of every event's low figure and every event's high figure. Midpoint is the average of the two.
Per day: the total divided by 730 days in the window.
Last 30 days: the Yandex strikes of 8 to 11 October 2026 and the Kyiv strikes from 19 September to 1 October 2026. The grouped Kyiv row also includes a Kyivstar site hit on 11 September.

Country comparisons

GDP: approximate yearly GDP in current US dollars, World Bank 2023. Tuvalu $62M, Nauru $154M, Kiribati $279M, Tonga $500M, Samoa $940M, Seychelles $2.1B, Fiji $5.4B.
A country's GDP is a yearly flow and these losses are mostly one-off. The comparison shows scale, not equivalence.
Companies: GAAP net income for the latest full fiscal year. Microsoft FY2026 (to June 2026) $133.7B on $331.8B revenue. Alphabet 2025 $132.2B on $402.8B. NVIDIA FY2026 (to January 2026) $120.1B on $215.9B, of which data center revenue $193.7B. Days = loss ÷ (net income ÷ 365).

Limits

19 of 25 rows rely wholly or partly on estimates, and 15 are estimates only.
No operator has published a damage figure for any war-damaged site. War rows are order-of-magnitude.
The Yandex and Kyiv reporting is days to weeks old, and both sides have reasons to inflate or minimise damage.