Temperatures throughout the day in summer are not even. Certain hours see a dramatic peak, especially 11 am and 4 pm. You may not think much of it and step outside for a quick chore. After all, it is only a few minutes. But do you know what may happen to you even during this brief time spent outside? And most importantly, why is this time window cautioned by doctors most?
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In an interview with HT Lifestyle, Dr Sandeep Reddy Koppula, HOD, internal medicine, Arete Hospitals in Hyderabad, explained why the hours between 11 am and 4 pm are usually regarded as the most hazardous and why stepping out during this time is discouraged. He asserted that this advice is not arbitrary but grounded in scientific reasoning, even if the heat does not always feel as intense as it appears on paper.
Why should you avoid going out from 11 am to 4 pm?
Here are the main reasons why you need to be alert during the afternoon window during summer:
1. This is when the heat is at its peak
The late morning to mid-afternoon window is when heat exposure is at its most intense. The doctor alerted that during this time, both temperature and sun intensity are at their highest. How does your body react? “Spending too much time out in the sun during the peak hours puts extra pressure on the body’s natural cooling, particularly in cities where the heat doesn’t ease off quickly.” Heat stress is something you should not take lightly, despite the initial signs not being observable.
2. Dehydration sets in faster than expected
The second biggest concern is dehydration, more so during the peak hours. Dr Koppula warned that even if you step outside for a while, you begin to sweat immediately, drying out. “By the time symptoms like thirst or fatigue show up, the body is already playing catch-up,” he reminded, suggesting that the first observable signs already indicate dehydration.
3. Heat exhaustion begins
Another alarming cause for concern is that peak hours are often the starting point for heat exhaustion, and it can set in even before one realises it. The doctor also raised concerns over early signs such as headaches, dizziness, and unusual tiredness.
4. Puts extra strain on the heart and circulation
High temperatures stress out your internal organs. Dr Koppula informed heart to be in risk, along with normal circulation.
Why? “In hot weather, the body has to put in extra effort to keep itself cool, and that often means pushing more blood towards the skin. For those who already have ongoing health issues, this can sometimes come through as feeling more drained than usual, a little unsteady at times, or just not having the same level of energy through the day.”
5. Risk is for everyone
Then we asked about vulnerabilities, and he ruled out the myth that the risk is limited only to outdoor workers. Everyone is at risk, even those who spend short periods outdoors. Routine activities such as quick errands, commuting, or school pick-ups can add up. With repeated exposure during this time, symptoms can build up cumulatively even in otherwise healthy people.
6. Children and older adults feel the impact sooner
Are there any more vulnerable demographics? The doctor noted that two groups stand out: “Children don’t always realise or say when they’re feeling too hot, and older adults often don’t feel thirsty as easily.” As a result, both groups may not recognise when the heat is beginning to take a toll on them until much later.
7. Affects focus and energy levels
Your cognitive performance dips, as the doctor explained, making you more distracted and short-tempered.
8. Recovery takes longer than expected
Recovery from heat exposure is much slower. Primarily, it is because of dehydration. “People often feel drained for the rest of the day, even after coming indoors,” the doctor said, suggesting how people do not bounce back instantly after a body is overheated or dehydrated.
What should you do instead?
The doctor strongly recommended planning activities before 11 am or after 4 pm, and as far as possible, limiting unnecessary exposure while staying well hydrated.
Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.
