LOS ANGELES (CBSLA) — Millions of mobile phones in the Los Angeles area lit up Wednesday night with a howling alert warning of strong winds that could create extreme fire danger.

The California Office of Emergency Services issued the alert at exactly 8 p.m., encouraging recipients to “Stay alert. Listen to authorities.”

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Fires in the Los Angeles area have burned more than 100,000 acres, an area greater than the entire city of Atlanta, since early Tuesday.

The alert with a long, loud tone startled users on social media, who were quick to respond to the message. Some responses were serious. Some were less so.