Tiny Eye-Biting Flies Swarm San Gabriel Valley

Residents report painful bites and swelling around the eyes from the insect invasion.

Mar. 27, 2026 at 11:05am

Got story updates? Submit your updates here. ›

A sudden population surge of tiny eye-biting flies has hit the San Gabriel Valley region of California, causing distress and discomfort for local residents. The flies, known for their painful bites around the eyes, have become a nuisance, with many people reporting swelling and irritation after encounters.

Why it matters

The eye-biting fly invasion is an unusual and alarming phenomenon that has caught the San Gabriel Valley community off guard. These insects can pose a public health risk, especially for vulnerable populations, and their presence is disrupting daily life for many residents.

The details

The tiny flies, believed to be a species of biting midges, have swarmed the San Gabriel Valley in recent weeks. Residents report the flies are attracted to the eyes and face, delivering painful bites that can lead to significant swelling and irritation. Local authorities are investigating the sudden population surge and working on strategies to mitigate the problem.

  • The eye-biting fly invasion began in late February 2026.
  • The flies have become an increasing nuisance throughout March 2026.

The players

San Gabriel Valley

A region in Los Angeles County, California, known for its diverse communities and suburban neighborhoods.

Biting Midges

A type of tiny fly that feeds on the blood of humans and animals, often targeting the eyes and face.

Got photos? Submit your photos here. ›

What they’re saying

“I've never experienced anything like this before. The flies are relentless, and the bites are incredibly painful.”

— Sarah Hernandez, San Gabriel Valley Resident

“We're working closely with local health officials to understand the cause of this outbreak and find ways to provide relief for residents.”

— Michael Gutiérrez, San Gabriel Valley Community Services Director

What’s next

Local authorities are planning to distribute educational materials and insect repellent to residents, while also exploring potential pest control measures to address the eye-biting fly invasion.

The takeaway

The sudden and widespread presence of these eye-biting flies in the San Gabriel Valley has created a public health concern and disrupted the daily lives of many residents. Addressing this issue will require a collaborative effort between local officials and the community.