India Weather: What are Heat Domes and what causes them? Will severity of heat waves intensify, what IMD has predicted? Is it a health emergency?
Currently, temperatures are hovering between 44 and 45 degrees Celsius in approximately 40 cities across the country—including more than four cities in Madhya Pradesh alone. Barring the hilly regions, the entire nation is generally experiencing heat levels of around 40 degrees.
Indicator of a dangerous trend
In reality, this is no longer merely an anomaly; it has become an indicator of a dangerous trend. The cause behind the abnormal heat currently gripping large parts of the country—including Delhi, Uttar Pradesh, Rajasthan, Haryana, Madhya Pradesh, Chhattisgarh, Maharashtra, and Telangana—is not solely seasonal variation, but rather a ‘Hot Dome’: an umbrella-like canopy of heat.
What is Heat Dome
This phenomenon occurs when a high-pressure system becomes stationary over a specific region, trapping hot air close to the Earth's surface. The result is continuously rising temperatures, severe heatwaves, and a direct impact on daily life.
According to Skymet Weather, Heat Domes are typically associated with minimal cloud cover and clear skies, which allow the unhindered penetration of solar radiation to the Earth’s surface, accentuating the overall temperatures. The high atmospheric pressure area acts like a lid on the atmosphere and causes warm air to be pushed downward, causing sinking motion of the air column, resulting in warming of the air parcel. Such a situation can hold for extended durations.
Heat Dome a direct consequence of climate change
However, the roots of this crisis run even deeper. Phenomena such as the ‘Hot Dome’ are a direct consequence of climate change and global warming. Rising greenhouse gas emissions, unchecked industrialization, and a model of development that is out of balance with nature have fundamentally altered the composition of the Earth's atmosphere. Scientists warn that if this trend persists, such ‘celestial cataclysms’ will become even more intense in the future. Farmlands will turn barren, water sources will dry up, and the very existence of wildlife will be jeopardized.
Severity of heatwaves is likely to intensify
The India Meteorological Department (IMD) has already issued a warning that the severity of heatwaves is likely to intensify further in North-West, Central, and Eastern India in the coming days. The threat is particularly heightened this time because, in many regions, the heat is compounded by high humidity—a combination that proves even more lethal to the human body.
A health emergency
Temperatures oscillating between 40 and 45 degrees Celsius represent not merely a matter of discomfort, but a signal of a health emergency. Children and the elderly, in particular, become the most vulnerable victims of this phenomenon. The impact of a heatwave is not merely external; it runs deep within the human body.
When the external temperature disrupts the body's internal equilibrium, the brain's hypothalamus—responsible for regulating body temperature—begins to fail in its function. This can lead to dehydration, organ dysfunction, and even life-threatening conditions. This underscores the fact that a heatwave is not simply a matter of ordinary summer heat, but a serious medical challenge.
South Asia could face massive economic and social losses by 2030
United Nations reports also corroborate this threat. By 2030, South Asia could face massive economic and social losses in the form of floods and water crises. Rising carbon dioxide levels in the oceans have diminished their absorption capacity, causing them to shift from acting as ‘carbon sinks’ to becoming ‘carbon sources.’ This situation is poised to accelerate the rise in global temperatures even further.
Will we heed the warning now
In light of this, the issue at hand is not merely about the weather, but rather about our development policies. Will we heed the warning now, or will we wait until nature's delicate balance has been completely disrupted? The ‘Hot Dome’ is not a transient phenomenon, but a permanent warning. The need of the hour is for governments to implement stringent environmental policies, promote renewable energy, and for ordinary citizens to make changes to their lifestyles.
Indeed, maintaining harmony with nature is the key to survival. If we fail to grasp this reality even now, this scorching sky could well become the greatest threat to life in the times to come.