The ‘Fake Cool Breeze’ Effect: Why Hot Winds in Chennai Still Feel Uncomfortable After Sunset
Stepping outside after dark in Chennai can be perplexing for many residents who expect a cool breeze in summer but find the wind blowing at a higher velocity, with the result feeling stickier, hotter, and more exhausting rather than refreshing.
According to meteorologists and climate scientists, this is a phenomenon that is part of the rapid growth of metropolitan areas; it is referred to informally as the “fake cool breeze” effect. A moving column of air gives the illusion of cooling, while at the same time holding stored heat and humidity, creating uncomfortable conditions.
What Happens After Sunset in Chennai
In contrast to dry inland cities, which cool rapidly after sunset, coastal cities will continue to release heat at a much slower rate.
The extensive use of concrete for buildings and asphalt for roadways, combined with the heat absorption of cars and trucks, allow for the accumulation of large amounts of heat throughout the day. This stored heat is then released into the surrounding atmosphere after sunset.
Why Humidity Makes Everything Worse
Humidity is another contributor to why the nights in Chennai seem to be so much worse than daytime temperatures, even with the reduction in average air temperatures.
Extremely high levels of humidity can prevent the efficient evaporation of sweat from skin; affected by high humidity levels, the body is much less able to cool itself, which increases discomfort.
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Why the Breeze Feels Misleading
While moving air can give the sensation of cooling before your body has had a chance to cool down, a warm, humid breeze will only provide a temporary feeling of relief to the skin as it does not provide effective cooling of the core body temperature.
How Residents Can Stay Comfortable
Experts recommend several methods for relieving nighttime heat exhaustion:
- Improve fresh air flow to the house
- Utilize airflow from the ceiling fan (or other fan) with the dehumidifier when able
- Consume adequate fluids all evening
- Restrict heavy meals during the peak humidity period
- Use breathable material (for example, cotton) clothing; and,
- Reduce indoor heat created by appliances and/or lights.
Final Words
During any given night, the combined effect of the warm air flowing from the ocean, the heat stored in the city and the high humidity will produce a painful degree of discomfort to almost anyone living in a coastal city during the summer. Unfortunately, with the continued change of climate, the difficulty of obtaining any genuine cooling during the nighttime hours is likely to become one of the most troublesome issues confronting major cities within India.
FAQs
Why does Chennai always feel hot, even at night?
Because of the buildings, the warmth from the buildings at night, and the high humidity, there will not be any combination of factors to give an effective cooling alternative.
What is the definition of the “fake cool breeze?”
The fake cool breeze is the sensation of cooling experienced by moving warm air, but it will not provide any cooling effect to the human body.
What is it about humidity that makes it feel so hot?
Humidity prevents proper evaporation of sweat from the body’s skin; therefore, the person will feel hottest when they are trying to stay cool.
