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We introduce heat stroke prevention challenges and our service usage examples for each industry.
Heat Stroke Prevention
Strengthen heat risk management at worksites with WBGT-based solutions
Heat stroke risks at summer construction sites are becoming more serious each year, threatening workers' lives. Additionally, revised Occupational Safety and Health Regulations effective June 1, 2025, now mandate heat stroke prevention measures for employers. Protecting worksite safety requires both prediction of temperature and humidity conditions and immediate response capabilities. Weathernews supports corporate heat stroke prevention through real-time data and high-precision forecasting.
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Heat Stroke Prevention Video
What is Heat Stroke? - Key Points for Managers
Heat stroke is a health disorder that occurs when the body's water and salt balance is disrupted in high-temperature, high-humidity environments, causing the body's temperature regulation function to malfunction. In outdoor work, body temperature tends to rise rapidly due to direct sunlight and reflection, making dehydration and electrolyte imbalance more likely to progress, requiring special attention. Starting with mild dizziness and lightheadedness, severe cases can cause consciousness disorders and convulsions, potentially becoming life-threatening in the worst cases.
Signs of Heat Stroke and Specific Methods for Early Detection
Heat stroke is a familiar health risk that can happen to anyone, and early detection and prompt response are key to preventing severe cases. Heat stroke severity is divided into three stages with the following symptoms.
Severity Classification
Grade I (Mild)
Grade II (Moderate)
Most severe Grade III (Severe)
Symptoms
Dizziness, muscle pain or stiffness, excessive sweating
Headache, discomfort, nausea or vomiting, fatigue, exhaustion
Consciousness disorder, convulsions, limb movement disorders, high body temperature
Required Response
Appropriate first aid at this stage is important.
Transportation to hospital is necessary.
Hospitalization and intensive care are required
※Source: Heat Stroke Environmental Health Manual 2022
Heat Stroke Risks and Practical Countermeasures at Worksites
Construction site on an extremely hot day Photo: Submitted via Weathernews app [*1]
Inside greenhouse exceeding 40°C Photo: Submitted via Weathernews app [*2]
Heat stroke risks in outdoor work are extremely high, and industries such as construction and infrastructure and agriculture, where work under scorching sun is unavoidable, require thorough measures to prevent occupational accidents. In addition to managing work hours based on WBGT (heat index), it's important not to miss Grade I signs and respond appropriately early. Specifically, mandatory frequent water and salt intake, securing rest areas in shade, wearing breathable work clothes, and creating awareness and open workplace environments where each employee pays attention to their physical condition changes and can immediately report any abnormalities are required.
Managers must continuously monitor work environments, constantly understand employee health conditions, and establish reasonable work systems. To prevent severe cases, it's important to establish early detection and first aid systems, and rapid transportation systems to medical institutions when necessary. We must recognize that heat stroke is a preventable disaster and work on enhanced countermeasures throughout the entire company.
Revised Occupational Safety and Health Regulations and Impact on Worksites
From June 1, 2025, the Occupational Safety and Health Regulations will be revised, mandating heat stroke prevention measures for employers. This legal revision aims to thoroughly implement early detection and prevention of severe cases at worksites, in response to increasing occupational accidents and fatalities from heat stroke in recent years.
The main points of this revision are the following three: • Establishment of heat stroke response reporting systems • Creation and dissemination of response procedures for onset • Thorough dissemination to all parties involved in worksites
At school environments, similar measures are recommended both as work environments for faculty and staff and for ensuring student safety. The revision of Occupational Safety and Health Regulations is an opportunity to recognize the importance of heat stroke prevention. Due to legal changes, worksites must establish systems that don't miss early symptoms of heat stroke and can respond quickly and appropriately. Employers and site managers are required to strengthen heat stroke countermeasures tailored to each site's risks based on the latest laws and notifications, and advance education and manual development so everyone can understand and practice new rules.
Heat Stroke Prevention with Weathernews
Soratena Pro
Instant "Heat Stroke Risk" Alerts to Managers and Worksites
Instant Heat Stroke Risk Alerts
The weather IoT sensor 'Soratena Pro' observes seven weather elements including rain, wind, temperature, and humidity every minute, calculates the heat index (WBGT) based on this data, and is a cloud service that "visualizes" heat stroke risks at worksites where Soratena Pro is installed.
Features
Real-time Heat Index Calculation
Based on temperature, humidity, wind speed and other data observed every minute by 'Soratena Pro', outdoor heat index is calculated in real-time using the Ministry of Environment's WBGT calculation formula.
4-Level Risk Display
Calculated heat index is clearly displayed in four ranks: "Caution", "Alert", "Severe Alert", and "Danger".
Customizable Alert Function
When set heat index thresholds are exceeded, alerts are sent via app push notifications and email notifications. Timing and conditions for notifications (which rank triggers notifications), notification intervals, and other settings can be finely customized to user needs.
Visual Warning Through Equipment Integration
Using email notifications as triggers, integration with equipment such as rotating lights (indicator lights) used at construction sites and factories enables visual notification of dangerous heat levels.
Utilization of Historical Data
Historical heat index data accumulated every minute can be used for analyzing situations when heat stroke occurs and optimizing alert notification conditions.
Benefits
Pinpoint Heat Stroke Risk Assessment
Accurate heat index based on actual weather data at installation sites can be grasped in real-time, enabling more precise heat stroke countermeasures.
Early Detection of Dangerous Situations and Rapid Response
Alert notifications and equipment integration when set thresholds are exceeded quickly notify of dangers, reducing heat stroke accident risks.
Flexible Countermeasures Tailored to Worksites
Notification methods and thresholds can be customized to site conditions and work content, enabling more effective heat stroke prevention.
Enhanced Employee Safety Awareness
By "visualizing" heat index and providing alerts and visual warnings, employee awareness of heat stroke can be heightened.
Post-incident Analysis and Countermeasure Improvement
By analyzing historical heat index data, situations where heat stroke is likely to occur can be identified and applied to future countermeasures.
Compliance with Regulations and Safety Management
At business sites where enhanced heat stroke countermeasures are required, implementing measures based on objective data contributes to legal compliance and strengthened safety management systems.
Details about Soratena Pro can be found here
View Service Page
Feel free to consult with us
We can provide proposals tailored to your challenges, including specific use cases for Soratena Pro. Please feel free to contact us with any pre-implementation questions or consultations.
Why not get a quote first?
We'll explain pricing details and provide specific content based on your site conditions so you can consider with confidence.
Free Quote
Contact us here
We'll explain in detail how to utilize features and the implementation process. Please feel free to consult with us.
Consider Implementation
Weathernews for business
Customize Heat Stroke Risk Levels for Each Worksite
Customize "Risk Levels" by Site
The corporate weather information service 'Weathernews for business' enables confirmation of heat stroke risk levels for each business location including facilities, stores, and outdoor worksites.
Features
Calculation Considering Season and Area
Weathernews' heat stroke risk prediction analyzes heat index (WBGT) and heat stroke patient transport numbers, setting and determining heat stroke risk levels uniquely suited to seasons and areas through Weathernews.
Prediction
Heat stroke risk levels and heat index (WBGT) can be confirmed for each location hourly up to 72 hours ahead.
5-Level Risk Display
Clearly displayed in five ranks:"Caution", "Alert", "Severe Alert", "Danger", and "Extremely Dangerous". "Extremely Dangerous" is a rank with a threshold of 33°C heat index (WBGT), which is the issuance standard for heat stroke alert warnings announced by the Ministry of Environment and Japan Meteorological Agency.
Alert Function
PUSH notifications can be sent for heat stroke risk levels or heat index (WBGT) at set locations, and announcement status of "Heat Stroke Special Alert" and "Heat Stroke Alert" issued by the Ministry of Environment and Japan Meteorological Agency.
Benefits
Enhanced Safety Management
By understanding heat stroke risks in advance for outdoor work and events and implementing appropriate measures, accidents and health problems can be prevented.
Optimized Operational Efficiency
Work efficiency can be maintained within reasonable limits through work planning and break time settings according to heat stroke risks.
Improved Customer Satisfaction
Customer satisfaction can be enhanced by providing safe and secure environments for event and service users.
Details about Weathernews for business can be found here
View Service Page
Feel free to consult with us
We can provide proposals tailored to your challenges, including specific use cases for Weathernews for business. Please feel free to contact us with any pre-implementation questions or consultations.
Why not get a quote first?
We'll explain pricing details and provide specific content based on your site conditions so you can consider with confidence.
Free Quote
Contact us here
We'll explain in detail how to utilize features and the implementation process. Please feel free to consult with us.
Consider Implementation
WxTech Data
Build Custom Systems with WBGT-Based Heat Stroke Index API
Build Custom Systems with Heat Stroke Index API
The Heat Stroke Index API provides detailed pinpoint heat stroke risk predictions. Displays hourly risks up to 72 hours ahead in 4 levels with high-resolution 1km mesh. High-precision predictions are possible considering past weather data and heat acclimatization. Real-time current values and historical data can also be obtained for use in various business scenarios.
Features
High-Precision Heat Stroke Risk Prediction
Provides detailed heat stroke risk predictions considering past weather data, heat acclimatization, and area characteristics.
Detailed 1km Mesh Information
Information provided in fine 1km mesh units enables pinpoint countermeasures.
Hourly Predictions
Hourly risk predictions up to 72 hours ahead enable more detailed countermeasure planning.
Benefits
Enhanced Safety Management
By understanding heat stroke risks in advance for outdoor work and events and implementing appropriate measures, accidents and health problems can be prevented.
Optimized Operational Efficiency
Work efficiency can be maintained within reasonable limits through work planning and break time settings according to heat stroke risks.
Improved Customer Satisfaction
Customer satisfaction can be enhanced by providing safe and secure environments for event and service users.
Creating New Value
Development of heat stroke prevention solutions utilizing APIs and creation of new services linked with weather data can be expected.
Details about WxTech Data can be found here
View Service Page
Feel free to consult with us
We can provide proposals tailored to your challenges, including specific use cases for WxTech Data. Please feel free to contact us with any pre-implementation questions or consultations.
Why not get a quote first?
We'll explain pricing details and provide specific content based on your site conditions so you can consider with confidence.
Free Quote
Contact us here
We'll explain in detail how to utilize features and the implementation process. Please feel free to consult with us.
Consider Implementation
Advertising Solutions Unique to Weather Companies
Deliver the right message to the right people at the right time, aligned with weather changes. Why not make advertising timing smarter using high-precision data unique to weather companies?
