Surprise Fireworks Over San Francisco Rattle Residents Around the Bay

A private corporate event's fireworks display caught many off guard, sparking concerns and complaints.

Apr. 13, 2026 at 12:22am by

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An extremely abstracted, out-of-focus photograph of colorful, blurred fireworks bursting over the San Francisco Bay at night, creating a hazy, dreamlike scene with no distinct forms or identifiable landmarks.Unexpected fireworks displays over the San Francisco Bay can be disruptive and distressing for many residents, highlighting the need for better coordination between private event organizers and local communities.San Francisco Today

A surprise fireworks show held by an engineering software company near San Francisco's Exploratorium on Saturday night was heard by residents across the Bay Area, leading to concerns and complaints about the loud noises that some initially thought were thunderstorms or even potential attacks.

Why it matters

Unannounced fireworks displays can be disruptive and distressing for many residents, especially those with mental health conditions, young children, or pets. This incident highlights the need for better coordination and communication between event organizers and local communities to avoid such surprises in the future.

The details

The fireworks, which began around 9:45 p.m., were part of an event held by Computers & Structures Inc., an engineering software company based in Walnut Creek. The San Francisco Fire Department said the Port of San Francisco fire marshal oversees fireworks events in that area, but that office did not immediately respond to a request for more information. Residents in cities across the Bay Area, including San Francisco, Emeryville, Oakland, Berkeley, Albany, Richmond, and Sausalito, reported hearing the loud noises and initially worrying that they could be related to potential attacks.

  • The fireworks began around 9:45 p.m. on Saturday, April 12, 2026.
  • A similar display was held by CSI in May 2025 for the company's 50th anniversary celebration at Pier 27.

The players

Computers & Structures Inc. (CSI)

An engineering software company based in Walnut Creek that held the private event with the surprise fireworks display.

Port of San Francisco

The office that oversees fireworks events in the area near the Exploratorium where the display took place.

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What they’re saying

“Awfully loud and disturbing.”

— NextDoor user

“This isn't just a minor inconvenience — it's genuinely harmful. Children with autism can become overwhelmed and distressed. People dealing with anxiety, PTSD, or other mental health challenges can be triggered. Dogs panic, birds scatter, and entire neighborhoods are disrupted.”

— San Francisco resident

“Half of you were thinking what I was thinking … that they were bombs. But, fortunately, this was purely entertainment.”

— NextDoor user

What’s next

After the fireworks display in May 2025, the Port of San Francisco said residents can sign up online to receive advance notifications about future fireworks events in the area.

The takeaway

This incident highlights the need for better coordination and communication between event organizers and local communities to avoid surprising residents with unannounced fireworks displays that can be disruptive and distressing, especially for vulnerable populations.