Chapter 30. Official Emergency Information, Smartphone Alerts, and Community Groups
During a wildfire, earthquake, flood, hazardous-material incident, power outage, extreme-heat emergency, or other disaster, information can spread almost as quickly as the event itself. Residents may receive smartphone alerts, social-media posts, forwarded screenshots, WhatsApp messages, neighborhood updates, videos, maps, and secondhand reports—all within a few minutes.
Some information may be useful. Other information may be delayed, incomplete, misunderstood, outdated, or entirely unverified. Residents of Pleasanton, Dublin, Livermore, San Ramon, Danville, Sunol, and surrounding Tri-Valley and Bay Area communities need a reliable method for deciding what to trust, what to share, and when to act.
Rely Primarily on Official Emergency Sources
Information involving evacuation orders, shelter-in-place instructions, road closures, public-health risks, utility restoration, fire boundaries, emergency shelters, and reentry should come primarily from authorized organizations.
Depending on the emergency, reliable sources may include:
- City and county emergency-management agencies
- Local fire departments and law-enforcement agencies
- CAL FIRE
- The California Governor’s Office of Emergency Services, or Cal OES
- FEMA and Ready.gov
- County public-health departments
- The National Weather Service
- Caltrans and local transportation agencies
- Electric, gas, and water utilities
- Official emergency-alert systems
- Verified government and public-safety accounts
These organizations receive operational information, coordinate with responding agencies, and have authority to issue public instructions. They may also know about dangers that residents cannot see, including changing wildfire behavior, damaged roads, hazardous air, downed electrical lines, contaminated water, or an approaching chemical plume.
No single source will necessarily publish every detail immediately. Conditions can change faster than websites or maps can be updated. Residents should therefore monitor several official channels while giving priority to the instructions issued directly for their location.
Enable Smartphone Emergency Alerts
Wireless Emergency Alerts can send brief warnings to compatible mobile devices in an affected geographic area. They may be issued by authorized state or local public-safety officials, the National Weather Service, and other authorized entities.
Confirm that emergency-alert settings are enabled on every household phone. Because Wireless Emergency Alerts do not replace every local notification method, residents should also register for their county’s opt-in emergency-alert program. Cal OES provides a county-by-county California emergency-alert signup page.
Add important locations when the system permits, including a home, workplace, school, childcare facility, or the residence of a vulnerable relative. Keep telephone numbers and addresses current.
Ready.gov also explains the principal emergency alert and warning systems, including Wireless Emergency Alerts, the Emergency Alert System, and NOAA Weather Radio. A battery-powered radio remains valuable when mobile networks, household electricity, or internet access are disrupted.
Treat Community Messages as Secondary Information
WhatsApp groups, neighborhood chats, community message boards, and social-media platforms can distribute information rapidly, but speed does not establish accuracy.
A message may have been:
- Written before conditions changed
- Copied from another community
- Forwarded without its original date
- Based on something a resident heard indirectly
- Accompanied by an outdated photograph or map
- Misunderstood by the person summarizing it
- Edited to remove qualifications or safety instructions
- Posted by someone seeking attention or influence
A confident tone is not evidence of expertise. A person who writes forcefully, claims to have “inside information,” appears in a photograph with emergency personnel, or says they are coordinating community assistance is not necessarily trained, certified, authorized, or connected to the agencies managing the emergency.
Residents should never allow an unofficial personality to overrule an evacuation order, shelter-in-place instruction, road closure, public-health notice, or utility warning.
Verify Before Forwarding
Before sharing emergency information, identify the original source—not merely the person who forwarded it. Look for the name of the agency, publication date, posting time, location, and a direct link to the official notice.
Ask:
- Is the source an authorized government, public-safety, health, or utility agency?
- Does the message apply to this community?
- When was it originally published?
- Has the agency issued a newer update?
- Is the account verified or linked from an official government website?
- Can the same information be confirmed through another official channel?
Screenshots are particularly risky because they may omit the source, date, link, corrections, or later updates. Whenever possible, share the current official post rather than a screenshot or rewritten summary.
FEMA advises the public to use trusted sources, discourage others from spreading unverified claims, and consult official information when evaluating disaster-related rumors.
Use Private Groups to Identify Personal Needs
Private community groups still have a legitimate and important role. They can help neighbors communicate individual needs that may not appear in a general public alert.
For example, a resident might report:
- Being stranded and needing information about official or safe transportation assistance
- An older adult who may require a welfare check
- A pet believed to have been left behind during an evacuation
- A resident who lacks essential medication
- A family needing temporary accommodations outside the affected area
- A neighbor who needs help understanding or translating an official notice
Group members can help by identifying the correct agency, sharing a shelter number, connecting someone with an authorized transportation service, offering accommodations in a safe area, or requesting a welfare check through the appropriate channel.
Protect privacy when posting. Share only the personal, medical, location, or access information necessary to obtain appropriate help. Move sensitive details to a direct conversation with an authorized organization whenever possible.
Do Not Self-Deploy into a Dangerous Area
A private request does not give anyone permission to enter an evacuated neighborhood, cross a barricade, drive onto a closed road, interfere with emergency operations, or place themselves in danger.
Do not:
- Reenter an evacuation zone to retrieve a person, pet, medication, or property
- Cross police tape, cones, gates, or road barricades
- Claim to represent a fire department, police agency, city, county, or relief organization
- Direct traffic or residents without authorization
- Transport someone through an unsafe or closed area
- Conduct an untrained rescue
- Promise access that emergency authorities have not approved
Instead, call 911 for an immediate threat to life. For non-immediate concerns, contact the appropriate fire department, law-enforcement agency, emergency shelter, animal-services organization, public-health department, utility, school, care facility, or emergency-management office.
Community responsibility means helping people reach qualified assistance—not becoming an unofficial responder.
Helpful Hint
Before forwarding emergency information, identify the original source, confirm the date and time, and check whether an authorized agency has published the same information. Share the direct official link whenever possible.
Important Safety Reminder
No one should reenter an evacuated area, cross a barricade, violate an emergency order, impersonate an official, or endanger themselves to respond to a private request. Report the need through the correct authorized channel and follow current official instructions.
Important Preparedness and Safety Notice
This chapter provides general preparedness education, not real-time emergency instructions. Conditions, evacuation zones, routes, shelters, road closures, and public-safety directions can change rapidly. During an emergency, consult current information from authorized public agencies and follow all instructions issued by emergency officials. Call 911 for an immediate threat to life, active fire, serious injury, crime in progress, or another urgent emergency.
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