Know the heat
before it hits.
Nowcast monitors current weather conditions and extreme-heat risk in your area — with live forecasts, heat-index charts, an interactive heat map, and community updates.
Live weather & forecast
Current conditions, temperature, your city, and an hourly forecast strip for the next few hours.
Heat-index chart
See how temperature, humidity, dew point, and heat index evolve over the next hours — and how dangerous it may feel.
Interactive heat map
Crowd-sourced heat-index readings near you, from mild green to extreme purple. Tap anywhere to request a reading.
Community feed
Share short, location-tagged updates with other users and see what's happening nearby.
Heat alerts
Set a danger threshold and get notified when the heat index crosses it — even in the background.
Google sign-in
Sign in with your Google account to post updates and personalize your experience.
Ready to stay ahead of the heat?
Download the latest release of Nowcast and start monitoring weather and heat-health in your area.
Go to releases