Fish biologists say as many as 100,000 trout, bass and catfish have died the past month in the Sparks Marina along Interstate 80.
Nevada Department of Wildlife spokesman Chris Healy says low oxygen levels killed about 3,000 fish in one corner of the 77-acre lake in mid-December but they thought the event was localized and of limited impact.
Since then, they've been unable to detect any live fish.
Biologists say a cold-snap could have stirred up oxygen-poor waters but they don't understand yet what caused the massive die-off.
"Background" ozone pollution levels in Northern California and Nevada could approach the limit of a proposed new federal air quality standard.
The latest seasonal drought outlook from the National Weather Service shows the drought in California, and much of Nevada, persisting and intensifying through December.
(AP) - Ranchers are telling a Nevada state panel that despite ongoing regional drought, there's plenty of grass on the range and they want to be allowed to turn cattle out to graze on it.
(AP) - Nevada has received funding to bring on 290 AmeriCorps volunteers to serve at more than 60 nonprofits in the next year.
A slight decrease in severe drought in the last week for one part of California and Nevada saw an increase in the intensity of exceptional drought.