Sirens

Know what's happening when you hear the sirens.

Important

Sirens is for informational awareness only. It is not a substitute for 911 and must not be relied upon in an emergency. Information may be delayed, incomplete, or inaccurate.

Sirens is not affiliated with, endorsed by, or operated by any county, municipality, or emergency-services agency.

Where incidents come from

Montgomery County

Dept. of Public Safety — fire, EMS & traffic (WebCAD)

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Bucks County

Dept. of Emergency Communications — police, fire & EMS

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Chester County

Dept. of Emergency Services — fire, EMS & traffic (WebCAD)

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Philadelphia

Reported crime — delayed, optional map layer (OpenDataPhilly)

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County data is pulled directly from each county's public dispatch feed and refreshed about once a minute. Chester incident locations are estimated street-level via © OpenStreetMap contributors. Philadelphia is reported crime from OpenDataPhilly — delayed about half a day and shown only as an optional layer, not live.