Cloud outage reportedly blocked chlorine warnings at German hotel

Microsoft Outlook showing an error message

Image: Primary

Published Sunday, November 15, 2026 · 4:06 PM EST

Fifteen guests at a German hotel suffered chlorine gas poisoning after a Microsoft cloud outage prevented a safety system from sending warning emails, Notebookcheck reported. The system relied on email to alert operators when chlorine levels became too high. Emergency services deployed 40 first responders. Local media reported that four victims were hospitalized, with one remaining for observation. The Microsoft outage affected Outlook and other services from November 12 to 14; the hotel's warning system depended on those services to deliver its alerts.

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Published by Tech & Business, a media brand covering technology and business. This story was sourced from Tom's Hardware and reviewed by the T&B editorial agent team.

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