When the weather gets extremely hot, like the kind we experience across Nigeria—most of us think about the obvious: sweating, dehydration, discomfort. But what many women don’t realize is that heat doesn’t just sit on the surface of the skin, but goes deeper, affecting the body’s internal balance, including hormones.
Hormones regulate everything: your mood, your menstrual cycle, your energy, even how your body handles stress. So when heat disrupts that balance, the effects can feel confusing: fatigue, irritability, irregular cycles, or just feeling “off” without knowing why.
To better understand this, we spoke to Dr. Rasheedat Bolaji, a family and general practice consultant, who explains that heat is not as harmless as we often assume.
“Extreme heat puts the body under stress, and once the body is stressed, hormones respond. That’s when you begin to notice subtle changes—in your mood, your cycle, even your energy levels.”
What Science Says About Heat and Hormones
Research is beginning to show just how connected heat and hormones are. A review published in Nature Reviews Endocrinology highlights that environmental factors like heat can influence how hormones are released and how they function in the body.
Another study shows that female hormones like estrogen and progesterone are directly linked to how the body regulates temperature. For example, progesterone can slightly increase body temperature, while estrogen helps the body cool down.
This means that when external temperatures rise, your body is already working harder—and your hormones are part of that adjustment.
5 Ways Heat Affects Women’s Hormones
1. It Disrupts Your Menstrual Cycle
One of the first things women notice in extreme heat is a change in their cycle. This can show up as delayed periods, shorter cycles, or more intense symptoms.
One research shows that hormonal fluctuations already affect body temperature during the menstrual cycle, especially in the luteal phase when progesterone is higher.
So when you add external heat to that, it can throw things off balance.
“Heat can interfere with the hormonal signals that regulate ovulation,” Dr. Rasheedat explains. “It may not happen to everyone, but some women will notice irregularities.”
2. It Increases Stress Hormones (Cortisol)
Dr. Rasheedate reminds Elowell Max that heat is a physical stressor. And whenever the body is stressed, cortisol—the stress hormone rises.
Even short-term heat exposure, like in saunas or hot environments, has been shown to trigger hormonal changes, including fluctuations in cortisol and other stress-related hormones.
This can leave you feeling irritable, tired but restless, and even mentally drained
“You may not connect it to the weather,” Dr. Rasheedat says, “but that constant feeling of being overwhelmed or exhausted during heat is often hormonal.”
3. It Affects Your Hydration and Fluid Hormones
When you’re dehydrated, your body releases antidiuretic hormone (ADH) to help retain water.
In women, this becomes more complex because hydration is already influenced by menstrual hormones.
“Women’s bodies are more sensitive to fluid changes because of hormonal cycles,” Dr. Rasheedat explains. “So dehydration in heat can affect you faster and more noticeably.”
This is why you may feel lightheaded, bloated and more fatigued than usual. Blame the heat.
4. It Impacts Mood and Emotional Stability
If you’ve ever felt more irritable or emotional during very hot days, it’s biological.
Hormones like estrogen and cortisol influence mood. When heat disrupts them, your emotional balance can shift. According to Dr. Rasheedat “Heat reduces your tolerance levels. Small things feel bigger. You’re more easily irritated, and that’s hormonal.”
Studies also show that extreme heat can affect overall well-being and emotional responses, partly because the body is working harder to regulate temperature.
5. It Can Affect Energy and Metabolism
Heat can make you feel unusually tired, even when you haven’t done much. That’s because your body is using energy to cool itself.
There’s also evidence that heat exposure can influence metabolic and hormonal activity, including hormones linked to energy and muscle function.
“Your body is working overtime in the heat, that’s why you feel drained”
Why Women Feel Heat Differently
Women’s bodies are naturally more sensitive to temperature changes because of hormonal fluctuations.
Estrogen helps with heat dissipation, while progesterone tends to increase body temperature. This means, some days, you feel hotter than usual, while other days, you tolerate heat better
Dr. Rasheedat shares simple, practical advice:
“Pay attention to your body. Heat can place internal stress on your body so ensure optimal hydration, rest, and awareness.
Here are a few things that help:
- Drink more water than usual (don’t wait until you’re thirsty)
- Avoid prolonged exposure to direct sun
- Eat lighter meals that are easier to digest
- Rest when your body feels drained
- Track your cycle to notice any changes
