Heat Waves and Heat Index

Background:

Heat waves are prolonged periods of excessively hot weather that can cause adverse impacts on human health, the environment, and the economy.
India, being a tropical country, is particularly vulnerable to heat waves, which have become more frequent and intense in recent years.
Heatwave is considered if the maximum temperature of a station reaches at least 40°C or more for Plains and at least 30°C or more for Hilly regions.
The Heat Index is a parameter that considers both temperature and humidity to calculate the apparent temperature or “feel like” temperature for human beings.
It helps in understanding the impact of humidity on high temperatures and how it contributes to human discomfort during hot weather.
The Heat Index has been launched on an experimental basis by the India Meteorological Department (IMD).
High Heat Index values indicate a greater risk of heat-related stress and health issues.

Linkage:

IMD’s Initiatives and Tools to Combat Heat Waves:

Timely issuance of heat wave forecasts to keep the public informed.
Warnings were provided to disaster management authorities for necessary preparedness.
IMD offers Seasonal outlook and extended range forecast offering additional insights into temperature trends.
Daily forecasts for the next five days with real-time updates.
Colour-coded warnings for severe weather events, including heat waves.
Cooperation with National Disaster Management Authority (NDMA) and local health departments for heat action plans.
Implementation of plans in vulnerable regions to minimize heat-related risks.

Current News:

India has witnessed a significant decline in heat-related deaths in recent years, reflecting the country’s efforts to combat the adverse effects of heat waves.
The India Meteorological Department (IMD) plays a vital role in this endeavour, issuing timely forecasts and warnings to mitigate the impact of severe weather events, including heat waves.
Recently, IMD introduced the Heat Index, a valuable tool that considers humidity’s influence on temperatures.

Impact:

By understanding the Heat Index, individuals and communities can take proactive steps to protect public health during heat waves.
It assists in making informed decisions and formulating heat action plans to ensure the well-being of the population.