Can summer heatwaves cause difficulty breathing?

Breathing becomes harder for many people during summer. Hot air, high humidity, and sudden temperature changes can cause chest tightness, shallow breathing, or shortness of breath. Some people feel tired more quickly than usual, while others feel like they can’t take a full breath. Summer heatwaves cause difficulty breathing in people of all ages — especially those with chronic conditions, but also in completely healthy individuals. Even if the symptoms seem mild, it’s important to listen to your body, take breaks, and find the right way to cope with the heat.

How heat affects your body

In summer, high humidity can make breathing much harder, especially for people with existing respiratory or heart issues. When the air is saturated with moisture, the lungs struggle to exchange oxygen because humid air has a lower oxygen concentration per volume.

This can cause a feeling of shallow breathing or air shortage, even when you’re inhaling normally. The body must work harder to supply enough oxygen. On days with humidity above 60%, especially in the evening, symptoms like shortness of breath, chest tightness, fatigue, and dizziness may appear.

Impact of humidity and pollution on airways

If you live in an urban area, pollution adds to the problem. In Belgrade, for example, traffic and industrial particles like PM 2.5 and ozone stay longer in warm air and easily irritate the airways. This can cause:

• difficulty breathing
• coughing
• burning in the nose or eyes
• asthma attacks in sensitive individuals

These reactions aren’t a cause for panic, but if symptoms keep recurring or don’t improve, a check-up at an ENT clinic in Belgrade may be needed. If you feel breathing discomfort while outside in the heat, it’s best to move indoors to a cool place.

Even simple nasal rinsing with saline can relieve symptoms by removing particles that irritate the mucous membranes. A light walk in the fresh morning air is often more helpful than staying in air-conditioned rooms with recycled air.

Summer heatwaves cause difficulty breathing by drying out the mucous membranes

Warm, dry summer air often affects the sensitive parts of the upper respiratory system. When the mucous membrane dries out, its ability to trap and eliminate harmful particles from the air decreases. This can lead to symptoms like:

• scratchy sensation
• tightness
• burning
• constantly stuffy nose without a cold

These symptoms often occur after sun exposure, wind, or prolonged time in air-conditioned spaces.

In people with frequent sinus inflammations or weakened mucosal function, symptoms may become more severe. The combination of high temperatures, dry air, and sudden humidity changes puts extra strain on the airways and can cause nasal breathing discomfort.

Sudden temperature shifts and allergen exposure make summer breathing harder

In summer, breathing may become difficult even for people without chronic conditions. The most common triggers are:

• increased exposure to allergens
• sudden temperature changes
• poor indoor air conditions

Warm, humid air combined with air conditioning often leads to dryness in the nose and throat. This can cause discomfort, burning, or mild congestion.

Summer allergies pose a specific challenge. Ragweed pollen, grasses, weeds, and street dust are present in high concentrations, especially in the early morning and evening. For sensitive individuals, exposure to these allergens can place additional stress on the airways. New allergies can appear at any age, so allergy testing is recommended from time to time to detect potential sensitivity to new allergens.

Who is at increased risk?

During summer, high temperatures especially affect:

• Older adults: In seniors, the body’s natural ability to regulate temperature weakens. As a result, summer heatwaves cause difficulty breathing for seniors even indoors. Excessive sweating can quickly lead to fluid loss, which further strains both respiratory and cardiovascular systems.
• Children: Due to narrower airways and greater sensitivity to environmental changes, children can react more quickly to heat, humidity, and allergens. If a child shows signs of fatigue, rapid breathing, or throat irritation, rest in a cool place, plenty of fluids, and nasal rinsing with saline are recommended. Extra care is needed for children with a history of allergies, bronchitis, or asthma.
• Adults with chronic respiratory or heart conditions: Warm, humid, and polluted air can worsen symptoms in people with asthma, COPD, or heart disease. Breathing becomes harder, with coughing, chest pressure, and shortness of breath. Heat increases strain on the body, as the heart and lungs work harder to maintain balance. Dehydration and low blood pressure further reduce oxygen delivery to tissues.

How to help the body recover from heat

Mild heat-related symptoms like fatigue, light dizziness, or chest heaviness usually ease on their own after short rest and time in a cool place. Most people begin to feel better within hours, though full recovery may take up to 24 hours depending on overall health.

If symptoms are more severe — such as a sudden drop in blood pressure, confusion, or difficulty breathing — recovery after heatstroke can take several days. In such cases, physical exertion should be avoided and vital signs monitored regularly.

How to prevent summer heatwaves from causing difficulty breathing

During the day, stay well-hydrated and eat light meals that don’t burden digestion. Heavy meals, sodas, and coffee can worsen dehydration, which makes breathing harder. Plan physical activity for early morning or late evening when it’s cooler, and take frequent breaks if spending time outside. If you notice mild symptoms of difficulty breathing, you can manage them at home without medication.

• The first step is to cool your body — take a lukewarm shower, rest in a well-ventilated space, and increase fluid intake.
• If you don’t have air conditioning, keep windows and blinds closed during the day to keep rooms cooler.
• In dry spaces, a fan can help, but in humid air, the effect is limited. To boost the fan’s cooling effect, place a bowl of water in front of it.

When symptoms start to ease, it’s best to return gradually to your regular activities. During this period, gentle breathing exercises can help the body recover faster. Inhale slowly and deeply through your nose, hold your breath for two seconds, then exhale gently through your mouth. This simple technique helps reduce tension and improves the body’s oxygen intake.

If you’re indoors, it’s important to air out the room occasionally and sit upright to help your lungs function better.

When to seek medical help

If rest and cooling off don’t help, or if your symptoms worsen, it’s essential to know when to call a doctor. The body sometimes can’t recover on its own from heat exposure. At Dr Prlja Medical in Belgrade, we can identify the cause and provide clear treatment recommendations. Warning signs include:

• Sudden difficulty breathing – may indicate a serious drop in blood oxygen levels, especially in people with chronic lung disease.
• Chest tightness – sometimes results from extra strain on the heart as it tries to regulate body temperature.
• Vertigo – often caused by dehydration and low blood pressure, which disrupt oxygen supply to the brain. If it persists or repeats, proper vertigo treatment should be discussed with a doctor.
• Loss of consciousness – may signal heatstroke and requires immediate medical evaluation without delay.
• Ringing in the ears – occurs due to dilation of blood vessels in the head and changes in inner pressure, especially if the person is dehydrated.
• Severe hoarseness – may result from irritation or swelling of the vocal cords due to dry and hot air.
• Feeling of choking – common in people with asthma, but may also indicate a reaction of the airways to high humidity, heat, or allergens.

Common mistakes people make while trying to cool down

Be mindful of how you cool your body.

• One common mistake is showering too quickly with cold water, which can cause blood vessels to constrict and trigger discomfort. Use lukewarm water and go gradually.
• Many direct fans at their faces, which can dry out mucous membranes and cause throat irritation.
• Some drink large amounts of ice-cold beverages, which may cause abdominal pain or sudden drops in body temperature.
• Another frequent mistake is staying in a room with a big temperature difference from the outside. Moving suddenly between cold and hot spaces can stress the airways and cause discomfort.

Make breathing easier on hot summer days

Summer heat can affect breathing even in healthy people. Summer heatwaves cause difficulty breathing for many, but with care and proper recovery, symptoms usually ease quickly. Pay attention to your body’s signals — fatigue, chest tightness, or discomfort while breathing require a break and the basics: cooling down, staying hydrated, and resting.