Onda de Calor (INMET)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
A heat wave is a climatic phenomenon characterized by a long sequence of days with temperatures above the average, usually in a specific region during a prolonged period. In our calculator, you can calculate the duration of the heat wave, based on the T_média + 5°C index, calculated by the National Institute of Meteorology (INMET).
The heat wave is important to understand the effects on human health, especially in vulnerable populations such as the elderly, children and people with chronic diseases. In addition, the heat wave can affect agriculture, economy and urban infrastructure, making it a relevant topic for climate management and urban planning.
Remember that the heat wave is a natural phenomenon, but can be exacerbated by anthropogenic factors, such as fossil fuel burning and deforestation. Therefore, it is essential to monitor climatic conditions and adopt preventive measures to minimize the effects of the heat wave.
Our heat wave calculator is a useful tool to understand and plan for climatic conditions. It can help identify risk periods and take informed decisions to protect health, safety and well-being.
Frequently asked questions
When is considered a heat wave?
A heat wave is considered when there are 5 consecutive days with temperatures above the average, with the index T_média + 5°C.
What is the objective of the heat wave calculator?
The objective of the calculator is to help understand and plan for climatic conditions, identifying risk periods and taking informed decisions to protect health, safety and well-being.
What is the index T_média + 5°C?
The index T_média + 5°C is an indicator calculated by the INMET to determine if there are abnormal climatic conditions, such as heat waves.
Can I use the heat wave calculator for other purposes?
Yes, the calculator can be used for other purposes, such as monitoring climatic conditions to plan outdoor activities or to take decisions on water resource management.
Who can use the heat wave calculator?
Anyone can use the calculator, as long as they have access to the internet and know how to use the tool.