Strong monsoon storms are hitting Las Vegas Monday with flash flooding threats. Officials warn of dangerous conditions through the night.

The forecast for the final days of August in Chicago includes mostly sunny skies with comfortable temperatures, minimal chance of precipitation, and a Beach Hazard Statement for Indiana beaches.

Sunny and warm weather is expected in Knoxville, with high temperatures in the 70s to low 80s and calm winds, transitioning to cooler nights and a slight chance of showers later in the week.

Traffic resumed on Gate Road into Black Rock City after weather delays forced a temporary closure, marking another familiar weather challenge for Burning Man attendees.

Hawaii expects calmer winds and typical summer weather, with limited rain chances and good flying conditions. Surfers will see small swells, and despite low humidity, fire risks stay low due to mild winds.

The San Francisco Bay Area is expecting a gradual cooling trend throughout the week with low chances of thunderstorms, consistent cloudy nights and sunny afternoons, and moderate winds. Beachgoers are warned of sneaker waves on south-facing beaches.

The National Weather Service predicts stormy weather for Las Vegas with showers, thunderstorms, and potential flash flooding, especially in parts of Southern San Bernardino County.

The National Weather Service forecasts a week of hot temperatures with intermittent chances of showers in Sacramento, including highs in the mid-90s and lows in the low 60s.

Seattle is under an Extreme Heat Warning with high temperatures expected until Wednesday, posing a risk of heat-related illnesses. Authorities advise staying hydrated, cool, and checking on vulnerable individuals.

NWS forecasts a cooler week with light showers for San Diego, and potential thunderstorms over mountains and deserts. Humidity remains high. A monsoon pattern will continue with a weekend cooling trend and less storm chances.

Denver's forecast includes daily thunderstorms and heavy showers, with a 70% chance of precipitation and risks of localized flooding. Residents advised to prepare for severe weather and cooler temperatures.

Heat warning issued for Portland/Vancouver Metro and other areas by the National Weather Service, with high temperatures up to 98F expected until Tuesday evening.

Los Angeles weather continues with sunny days and cool, foggy nights, with temperatures in the mid-80s and mild evening fog expected throughout the week.