The arrival of the monsoon may provide relief from intense summer heat, but sudden changes in temperature, high humidity and disrupted daily routines can create additional health challenges for people already at risk of stroke.
Medical evidence does not show that rain itself directly causes a stroke. However, rapid changes in temperature, humidity and atmospheric pressure have been associated in some studies with changes in stroke admissions and outcomes. The relationship is complex and may differ according to climate, location and individual health conditions.
People with high blood pressure, diabetes, high cholesterol, heart disease, obesity or a history of smoking remain at greater risk throughout the year. High blood pressure is one of the leading causes of stroke because it can damage or block the blood vessels supplying the brain.
How Weather Changes May Affect Vulnerable People
High humidity can make it harder for the body to regulate temperature, while hot weather and inadequate fluid intake may contribute to dehydration.
Changes in weather may also affect blood pressure, physical activity, sleep and medication routines. These factors could place additional strain on people who already have cardiovascular or metabolic conditions.
However, the presence of humid or rainy weather does not mean that a stroke will occur. The most important preventive measure is keeping established risk factors under control.
People taking medicines for blood pressure, diabetes, cholesterol or heart disease should continue them as prescribed and should not alter the dosage without consulting a doctor.
Remember the BE-FAST Warning Signs
A stroke occurs when blood flow to part of the brain is blocked or when a blood vessel in the brain bursts. Brain damage can begin quickly, making urgent treatment essential.
The BE-FAST method can help people recognise the warning signs:
B — Balance: Sudden dizziness, loss of balance or difficulty walking.
E — Eyes: Sudden loss of vision, blurred vision or double vision.
F — Face: One side of the face suddenly droops or becomes numb.
A — Arms: Sudden weakness or numbness in one arm or leg.
S — Speech: Slurred speech, difficulty speaking or trouble understanding words.
T — Time: Call local emergency services immediately.
The World Health Organization and the American Stroke Association identify these as important warning signs requiring urgent medical attention.
Do not wait for the symptoms to improve and do not attempt to take the patient to sleep. Even if the signs disappear after a few minutes, they may indicate a transient ischaemic attack, sometimes called a mini-stroke, which requires urgent assessment.
How to Lower Stroke Risk During the Monsoon
People at higher risk should monitor their blood pressure and blood sugar regularly and attend scheduled medical appointments.
A healthy routine should include regular physical activity, adequate sleep, a balanced diet and limited salt intake. Smoking should be avoided, while alcohol consumption should be restricted according to medical advice.
Drinking sufficient safe water is important, particularly during humid weather. However, people with heart failure, kidney disease or conditions requiring fluid restriction should follow their doctor’s personalised instructions.
Medications should be taken at the prescribed time, even when rain, travel disruption or changes in routine make access more difficult.
People should also seek treatment for fever, severe diarrhoea, vomiting or other illnesses that can cause dehydration or disrupt blood pressure and blood sugar control.
When Emergency Help Is Essential
Immediate medical assistance is required when a person suddenly develops facial drooping, weakness on one side of the body, loss of balance, speech difficulty or vision changes.
Other concerning symptoms may include a sudden severe headache, confusion, collapse or loss of consciousness.
Stroke is a medical emergency in every season. Recognising the symptoms quickly and reaching an appropriate hospital without delay can improve the chances of survival and reduce the risk of permanent disability.
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