RENO, Nev. — The Latest on wildfires burning in Nevada (all times local, PDT):

4:50 p.m.

Interstate 80 has reopened near the California-Nevada line where firefighters now estimate 20 percent containment of a blaze that’s burned through about a square mile of rugged canyons west of Reno.

A 25-mile stretch of I-80 has been closed off-and-on since the fire broke out Monday. Traffic was stopped in both directions Tuesday morning when flames burned within 15 feet of the highway along the Truckee River southwest of Verdi.

The California Highway Patrol says traffic that was backed up for miles is moving in both directions, but with some lane restrictions and intermittent stops for safety checks.

Fire officials say about a half dozen structures were potentially threatened but no evacuations have been ordered.

The Sierra Front Interagency Fire Center estimates 670 acres have burned. No injuries are reported.


11:35 a.m.

Smoke from a wildfire that has closed a 25-mile stretch of Interstate 80 near the Nevada-California line has triggered an air quality warning in the Reno-Sparks area.

The Washoe County Health District said Tuesday that young children, the elderly and people with lung disease or asthma should avoid any extended outdoor activity.

The Sierra Front Interagency Fire Center says no evacuations have been ordered but seven structures currently are threatened and fire crews in the Reno-area remain on alert in case the winds push the flames toward the city.

Truckee Meadows Fire Protection Chief Charles Moore says it’s “an unpredictable situation.”

Trucks have lined up for 3 miles along the shoulder of westbound I-80 where the interstate is closed at the California-Nevada line. Authorities say they have no idea when the highway will reopen.

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Authorities have closed a 25-mile stretch of highway crossing the Nevada-California border as firefighters battle spot fires, debris and smoke from a wildfire west of Reno.

The California Highway Patrol closed the eastbound Interstate 80 Tuesday morning near the town of Truckee as high winds drove a wildfire within 15 feet of the highway.

Nevada troopers closed the highway’s westbound lanes near Verdi.

California Highway Patrol spokesman Officer Peter Mann did not know when the highway winding north of Lake Tahoe would be reopened. He says the fire is burning in a remote area but has caused some rocks to fall. No injuries were reported.

The 600 acre (242.82 hectare) fire started Monday but is not threatening structures. Investigators are trying to determine its cause.

Mann says drivers were being re-directed to a highway south closer to Lake Tahoe.