Close ILTakeCare Suggestion
IL TakeCare app – For all your insurance & wellness needs

Policy purchase, claims, renewal & more

 

What Is a Heatwave? Definition, Impacts & Safety Measures

Heatwaves are defined by IMD as periods when temperatures reach specific thresholds in different regions. These events cause economic, environmental, and social impacts while posing serious health risks like heat exhaustion and dehydration.

  • 28 Mar 2025
  • 6 min read
  • 1717 views

The meaning of a heat wave is particularly relevant at the start of the summer season when temperatures begin to rise. Heat waves are periods of excessively high temperatures that can be hazardous to health. Recently, the prevalence and intensity of these events have increased, making it crucial to understand their types and preventive measures.

 

In this blog, we will focus on the heat wave definition, explore the impacts of heat waves, and discuss how to avoid them.

Criteria for Heat Waves by The Indian Meteorological Department (IMD)

The IMD has certain guidelines that it follows while issuing an alert for a heat wave to the public. These are the criteria that can help identify heat wave occurrence:

 

  • Temperature Threshold: The IMD defines a heatwave when the highest temperature reaches 40 degrees Celsius in the plains, 37 degrees Celsius in coastal areas, and 30 degrees Celsius in hilly regions.
  • Temperature Deviation: If the maximum temperature rises 5-6 degrees Celsius above the normal rate, it is classified as a moderate heatwave. A severe heat wave is defined as a rise of more than 7 degrees Celsius.
  • Duration: The duration of consecutive hot days also plays a critical role. A heat wave that lasts for two days or more can be particularly dangerous.

Impact of Heatwave

Heatwaves can cause discomfort, but they also impact our lives and surroundings in various ways. Here are some key effects:

 

  • Economic impact: In hot climates, workers may experience reduced productivity and additional energy will be required to cool down rooms. Heatwaves also negatively impact crops and properties, which are sources of income, leading to financial losses.
  • Environmental effects: Heatwaves are dangerous as they can lead to droughts and fires and adversely affect the lives of animals and plants. They can also accelerate the melting of glaciers and ice caps, thereby contributing to climate change.
  • Social impact: It causes inconveniences by impacting learning institutions and preventing events from taking place. Additionally, it has the potential to increase stress and social anxiety within the community.

Health Impacts of Heat Waves

Heatwaves can have severe health impacts. A few are as follows:

 

  • It can cause symptoms such as excessive sweating, weakness, dizziness, and nausea when the body becomes too hot.
  • It can lead to a more serious condition if the body's temperature regulation fails. This is potentially fatal and requires immediate medical attention.
  • Heat can cause the body to lose more fluids, leading to dehydration, which can damage the kidneys and affect overall health.

 

It is crucial to stay well-hydrated, avoid prolonged exposure to the sun, and rest in the shade during a heatwave to prevent such conditions. Health insurance can provide financial support for medical care if these preventive measures are insufficient and you require treatment for heat-related health issues.

How to Recover From a Heatwave?

Post-heat stroke, the body requires some time to cool down and come back to normal.

 

  1. Stay hydrated: It is recommended that you drink a lot of water even when you do not feel thirsty.
  2. Eat light, cool meals: Consume foods that are light and help cool the body, such as salads and fruits.
  3. Rest and relax: You should give your body time to recover, especially if you have experienced symptoms of heat illness.
  4. Check your home: Confirm that appliances are in working order.
  5. Learn from the experience: Use your understanding to prepare for any future heat waves.

Emergency Kit for a Heatwave

In the case of heatwaves, prevention is the best cure. Below are some of the recommended items that you should include in your heatwave emergency kit:

  • Water and other foods that do not easily get spoiled
  • A battery-operated fan and some extra batteries are needed.
  • First-aid kit
  • Emergency contact list
  • Medications, especially for those with chronic diseases.
  • Light, loose-fitting clothing
  • Sunscreen and sunglasses

Conclusion

You must know all about heatwaves to combat them. Preparation and knowledge are key to avoiding danger during hot weather. By following these tips and staying informed about heat waves, you can protect yourself from their effects. Stay cool, stay safe, and ensure your health insurance is up to date for added peace of mind.


Disclaimer: The information provided in this blog is for educational and informational purposes only. It is not intended as a substitute for professional advice, diagnosis, or treatment. Please consult your general physician or another certified medical professional for any questions regarding a medical condition. Relying on any information provided in this blog is solely at your own risk, and ICICI Lombard is not responsible for any effects or consequences resulting from the use of the information shared.

Also read:

  • Looking for tailored advice?

    Schedule a call with our insurance advisors

  • OR
  • Call us:

    1800 2666
Please enter valid name
Please enter a valid mobile number
Please select the Category

Subscribe to our newsletter

Understand insurance better by reading our helpful guides, articles, blogs and other information.

Please enter valid name
Please enter valid Email

Error message here