Power failures are identified as the leading cause of data center outages, making up 45% of impactful incidents, according to Uptime Institute’s 2026 Annual Outage Analysis report. This report reveals a decline in overall outage frequency but highlights increasing challenges in data center resiliency. Operators are facing mounting pressures from AI workloads, aging infrastructure, and external dependencies.
Despite an overall trend of fewer outages per site over the past five years—thanks to improved operational maturity and investments in resilience strategies—analysts suggest that traditional methods may no longer suffice as systems become more complex. Increasingly, data center issues are the result of interconnected systems, rather than isolated failures.
“Inevitably, failures will be linked to complex interactions between systems, including software, networks, and external dependencies," explains Andy Lawrence, executive director at Uptime Intelligence. Despite progress made, half of surveyed operators reported experiencing significant outages in the past three years, a decline from 74% in 2020. However, about 10% classified their most recent outage as severe.
Power-related issues remain the most critical factor, with contributing incidents such as UPS failures and generator malfunctions compounding problems as grid instability grows. The report also notes that supply shortages of critical infrastructure components like transformers and generators may lead operators to rely on less reliable, secondhand parts.
In terms of network reliability, the findings reveal that networking and connectivity issues are prevalent contributors to IT service-related outages when considering incidents that extend beyond data center confines. Networking and connectivity problems account for 23% of outages, followed closely by power issues. This emphasizes the necessity for enhanced network resiliency, as failures can affect numerous critical services intertwined with cloud and application infrastructure.
Uptime’s report indicates that the rise of high-density AI workloads is reshaping operational risk profiles. The volatility in power demands associated with GPUs can stress existing cooling and electrical infrastructure, raising concerns about generating capacity during power fluctuations.
Another significant focus of the report is that risks of outages are increasingly originating outside the confines of the data center itself, with failings in fiber and connectivity technologies rising sharply. Human error continues to be a notable factor, with 92% of operators attributing at least some contributory presence to human mistakes in outages experienced over the last three years.
To address these issues, operators are encouraged to enhance operational discipline, revise emergency procedures, and conduct regular training drills to prepare staff for real-world outage scenarios. This proactive approach is designed to mitigate risks associated with modern complexities impacting data center and IT service resiliency.
