Extreme Heat Watch

* WHAT...For the Heat Advisory, highs 100 to 105 degrees with overnight lows between 62 to 70 degrees. Widespread Moderate (level 2 out of 4) HeatRisk with areas of Major (level 3 out of 4) HeatRisk in lower valleys. For the Extreme Heat Watch, highs 101 to 106 degrees with overnight lows between 65 to 74 degrees. Widespread Major HeatRisk.

* WHERE...Western Nevada Basin and Range including Pyramid Lake.

* WHEN...For the Heat Advisory, from 8 AM Wednesday to 8 AM PDT Thursday. For the Extreme Heat Watch, from Thursday morning through Sunday morning.

* IMPACTS...Heat-related illnesses will be more likely, especially for those spending extended periods outdoors, in poorly cooled indoor spaces, or who are sensitive to heat.