LAKE TAHOE, Calif./Nev. — If you’ve been hiking, cycling, paddling or spending time outdoors around Lake Tahoe this week, you’ve likely noticed hazy skies and the distinct smell of smoke.

The smoke affecting the Tahoe Basin is primarily drifting in from the Gann Fire burning in Calaveras County. The wildfire, which ignited Monday evening near Valley Springs, has burned approximately 9,360 acres.

“While the westerly winds will help to clear the smoke that was carried from the north on our recent northerly winds, it will also be carrying with it smoke from a newer fire in central California (Gann Fire),” the Reno National Weather Service said in a forecast discussion.

According to NWS, smoke and haze from regional wildfires could bring periods of reduced air quality throughout the week. Smoke conditions may fluctuate from day to day depending on wind direction and fire activity.

The smoky conditions coincide with a heat advisory in effect from 8 a.m. Wednesday through 8 a.m. Sunday for portions of western Nevada and northeast California, including the Tahoe Basin. Forecasters are warning of hot daytime temperatures and limited overnight cooling, warning about the moderate to major risk of heat-related impacts without protective action.