# What is a SEV1 incident? Understanding critical impact and how to respond

DevFeed: [What is a SEV1 incident? Understanding critical impact and how to respond](<https://devfeed.tech/articles/what-is-a-sev1-incident-understanding-critical-impact-and-how-to-respond-12070.md>)

Original publisher: [Read original article](<https://incident.io/blog/what-is-a-sev-1-incident>)

Author: Kate Bernacchi-Sass

Published: 2024-10-11T14:00:00Z

Content type: tutorial

Language: en

Sources: [The incident.io Blog](<https://devfeed.tech/sources/the-incident-io-blog.md>)

Topics: [incident](<https://devfeed.tech/topics/incident.md>), [incident management](<https://devfeed.tech/topics/incident-management.md>), [Incident response](<https://devfeed.tech/topics/incident-response.md>), [Resilience](<https://devfeed.tech/topics/resilience.md>)

Tags: [business](<https://devfeed.tech/tags/business.md>), [customer](<https://devfeed.tech/tags/customer.md>), [incident](<https://devfeed.tech/tags/incident.md>), [incident-channel](<https://devfeed.tech/tags/incident-channel.md>), [incident-management](<https://devfeed.tech/tags/incident-management.md>), [incident-response](<https://devfeed.tech/tags/incident-response.md>), [operations](<https://devfeed.tech/tags/operations.md>), [outage](<https://devfeed.tech/tags/outage.md>), [post-mortem](<https://devfeed.tech/tags/post-mortem.md>), [resilience](<https://devfeed.tech/tags/resilience.md>), [slack-incident](<https://devfeed.tech/tags/slack-incident.md>)

## AI overview

This article explains what a SEV1 incident is, why it represents the highest level of incident severity, and how critical outages or failures can disrupt operations, revenue, customers, and brand reputation. It introduces the incident response lifecycle, severity levels from SEV1 to SEV4, and the importance of preparation, tools, and strategies for minimizing disruption.

## Source excerpt

Ever hear the phrase "expect the unexpected"? That's a SEV1 incident in a nutshell. Understanding what a SEV1 incident is--and how it differs from other severities--is the first step in building organization-wide resilience and, ultimately, bouncing back stronger.