Public Alerts

We know information is critical during any emergency. This is why we use multiple tools to send out emergency public information. We encourage you use the tools the work best for you.


AlertSF is a text-based notification system for San Francisco's residents and visitors. AlertSF will send alerts regarding emergencies disrupting vehicular/pedestrian traffic, watches and warnings for tsunamis, flooding, and Citywide post-disaster information to your registered wireless devices and email accounts. Registrants can also sign up to receive English-language automated information feeds and/or alerts targeted to specific areas of the City.

To sign up for AlertSF please visit:

Twitter: @SF_Emergency

@SF_Emergency is the Department of Emergency Management’s official Twitter account for emergency public information. In general we provide information on 1) what to do (e.g., avoid the area); and 2) what geographic area is impacted; and 3) whether the incident is related law enforcement, fire, transit, or traffic.

Follow us at @SF_Emergency

Outdoor Public Warning System

The City’s Outdoor Public Warning System is designed to alert residents and visitors of San Francisco about possible danger. Specific emergency announcements can be broadcast over any one (or more) of the 109 sirens which are located on poles and on top of buildings throughout all neighborhoods in San Francisco, Treasure Island, and Yerba Buena.

Visit for more information.

Wireless Emergency Alerts

Wireless Emergency Alerts (WEAs) are used to send concise, text-like messages to WEA-capable mobile devices during emergency situations. WEAs are sent by your state and local public safety officials, the National Weather Service, the National Center for Missing and Exploited Children, and the President of the United States.

Learn more at


SF72 moves beyond the concept of building a disaster kit — instead, it will provide accessible tools and simple steps to help San Franciscans connect with one another and support their communities, now and in the event of an emergency. SF72 has the following features:

Connect offers a forum for individuals or groups to share and connect with their community. This section allows users to list and pledge their skills and resources — such as a generator, bottled water, or babysitting services — to help their chosen network during an emergency.

Prepare is the educational component of the SF72 website. It is the central location where residents can learn how to protect themselves, their family, and their friends from potential hazards. It provides the tools needed to share and teach preparedness, using personalized stories and identifying triggers that prompt people to prepare. We believe a thousand tiny acts of preparation can have just as much impact as bunkers and hardhats.

CityNow is the portion of the website that will provide up–to–date information on current emergencies, including a description of the emergency and instructions for any actions that the public should take (e.g., boil water, shelter in place, avoid the area around Civic Center, etc.). This section of the website will become the homepage of SF72 during a major emergency.

To learn more visit