HeatAlert: Heat Stress Index

HeatAlert: Heat Stress Index

WBGT Conditions & Monitoring

11 ratings

#181 in free Weather

💪 Health & Fitness

Free

Details

Released
Updated
Version
Compatibility
Age Rating
Monetization
Size
Devices
Data updated
Languages

January 10, 2025
April 23, 2026
1.5.6
iOS 13.0+
4+
free
34.53MB
iPhone, iPad, iPod
5 days ago
American English

Developer

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📈no. 181

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About

This application provides real-time Wet Bulb Globe Temperature (WBGT) and detailed weather forecasts for your location. It offers heat stress risk assessments and actionable recommendations to help you stay safe outdoors. Receive location-based insights including temperature, humidity, wind speed, and UV index.

✓Real-time WBGT values

✓Location-based weather forecasts

✓Heat stress risk assessment

✓Actionable safety recommendations

✓UV index and humidity data

✓Powered by Tempest Weather Systems

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What's New in HeatAlert

1.5.6

April 23, 2026

Bug Fixes and Performance Enhancements

Charts

Top Free

📈 181+5

This app rose +5 positions in Weather chart.

Last updated on July 27, 2026.

User reviews

Most Recent Highest Rated Lowest Rated

Bad app

Inaccurate weather. Niosha is more accurate with wind and humidity. Says it’s 82 when it’s 111 outside

Constructionman11

14 days ago

Finally true wet bulb global temps!

Been after an app that would calculate these for ages. With the heat wave in Europe I need to know if it’s safe to train. This app serves that purpose

Thank you devs!

rxp91

a month ago

Doesn’t work

I can not make this app work at all on my iPhone 13.
I have tried everything i can think of to do.

ehfeieieiene

2 years ago

Response from developer

Hey! Please contact our support team for assistance and troubleshooting. You can email us at support@tempest.earth or open a ticket from help.tempest.earth

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FAQ

What is HeatAlert's WBGT accuracy based on?

HeatAlert uses real-time temperature, humidity, wind speed, and solar radiation data from over 65,000 Tempest Weather Systems. This ensures the WBGT values are tailored to your specific location for better environmental condition understanding.

Does HeatAlert offer recommendations for heat safety?

Yes, HeatAlert provides actionable recommendations based on the National Weather Service WBGT suggested actions. These guidelines help users stay safe and cool in hot weather conditions.

How often is HeatAlert updated?

The app is committed to regular updates with new features and improvements. The latest version is 1.5.5, and it was last updated on December 2, 2025, indicating a focus on ongoing development.

What devices is HeatAlert available on?

HeatAlert is available for iPhone, iPad, and iPod devices. It is designed to provide its heat stress monitoring features across Apple's mobile ecosystem.

What is the age rating for HeatAlert?

HeatAlert has an age rating of 4+, making it suitable for a wide range of users. This indicates no mature content is present in the application.

Does HeatAlert have ads?

No, HeatAlert does not contain advertisements. Users can enjoy a seamless experience without interruptions from in-app ads.

What kind of weather information does HeatAlert provide?

HeatAlert provides detailed weather forecasts tailored to your specific location. This includes current temperature, humidity levels, wind speed, UV index, and precise WBGT values.

When was HeatAlert first released?

HeatAlert was first released on January 17, 2024. This makes it a relatively new application focused on providing up-to-date heat stress monitoring.