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Air Quality & Wildfire News — June 25, 2026

Canairy · 4 min read · 2026-06-25

A quieter day on the smoke front, but several stories worth tracking: rising fire danger in northern Nevada, the aftermath of a stubborn warehouse fire in Los Angeles, a small foothill fire near San Jose, and a pair of studies on how the environment shapes air quality and health.

Red flag warning raises fire danger near Reno

The National Weather Service has issued a red flag warning for much of the Reno-Carson region, where strong winds and low humidity are expected to increase wildfire risk. According to the Reno Gazette-Journal, the warning runs from 11 a.m. Friday through 11 p.m. Saturday and covers the Sierra Front, including Carson City, Douglas and Storey counties, along with parts of Washoe and Lyon counties.

Forecasters expect winds of 20 to 30 mph with gusts up to 45 mph, and afternoon humidity dropping as low as 12%. Residents are urged to avoid activities that could create sparks near dry vegetation. When fire danger is this high, it is a good time to keep an eye on local conditions and have a plan in case smoke moves into your area.

East L.A. warehouse fire is out, but cleanup begins

The warehouse fire in Boyle Heights that burned for about a week is finally extinguished, and attention has shifted to cleanup. As ABC7 reports, the Los Angeles Fire Department says there is no longer active heat, flame or significant smoke at the site, though crews continue working as Cal/OSHA opens an investigation.

Some residents told ABC7 they remain concerned about lingering smoke and have struggled to obtain free air purifiers distributed by the city. Environmental teams are testing and filtering fire-water runoff before it reaches storm drains. Even after flames are out, light smoke and odors can persist, so closing windows and running an air filter indoors can help on days when the air still smells of smoke.

Small fire flares in the foothills east of San Jose

Crews battled a wildfire Wednesday night in the foothills east of San Jose. The Santa Rosa Press Democrat reports the fire broke out around 9 p.m. near Sierra Road and was about 5 acres with a slow rate of spread, with no structures threatened. Crews from the San Jose Fire Department, Cal Fire and a local volunteer department stopped forward progress on one flank within the hour.

Rainfall history shapes air pollution, study finds

New research led by University of Michigan engineers found that an air mass's rainfall history matters as much as where the air came from when predicting pollution levels. As the Environmental News Network reports, the team analyzed cloud and rainwater samples collected over 19 summers at the top of Mount Washington, New Hampshire. The findings give meteorologists a physical benchmark to improve simulations of how pollution moves over complex terrain.

Study weighs environment against genetics in disease risk

A Penn State study examined how genes and environmental factors — including air pollution — affect a person's chances of getting sick. As reported by WIS News 10, researchers used AI to sift through health records of 50 million adults and looked at exposure to particulate matter and nitrogen dioxide. Professor Dajiang Liu said air pollution can raise the risk of some health problems more than inherited genes — which he framed as good news, because people can take steps to reduce their exposure. He recommended checking local air pollution levels at AirNow.gov.

Sources

Canairy aggregates publicly reported air-quality and wildfire news and summarizes it in plain English, with links to the original sources. This is educational information, not medical or emergency advice. In a wildfire or air-quality emergency, follow guidance from local authorities.