Microsoft 365 outage leads to chlorine gas poisoning of 15 hotel guests
The 'maintenance safety system' relied on Microsoft Outlook to send warning messages to the operator.
Fifteen hotel guests in Germany were poisoned by chlorine gas due to a Microsoft cloud services outage. The hotel's "maintenance safety system" for its sauna area used email alerts to warn operators if chlorine levels were too high. However, when the Microsoft service went down, the system was unable to send its warnings, resulting in dangerously high chlorine levels and injuries to the guests.
German emergency services sent 40 first responders to the scene. Four victims were hospitalized, with one remaining for further observation. This incident highlights the risks of relying on online services for critical systems and the importance of having physical backups.
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