LAS VEGAS (KTNV) — MORNING: A warm start in the upper 80s and low 90s around Las Vegas with sun and south winds at 5-15 mph. AFTERNOON: Sunny with highs near 114° and southwest winds at 15-30 mph. The Extreme Heat Warning is in effect through Wednesday and may need to be extended. Forecast pollen levels are "low" this week, with ragweed and chenopods listed as the predominant pollen types. The air quality forecast is "moderate" today and tomorrow on account of ozone.