A new study highlights humid heat—high temperature combined with high humidity—as a rapidly growing climate threat in India, with Kerala emerging as a major hotspot due to its coastal monsoon-driven climate and rising heat stress conditions.

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• A recent study published in Climate Dynamics identifies humid heat as a more dangerous climate risk than dry heat, as it disrupts the body’s ability to cool through sweat evaporation.
• Researchers found that Monsoon systems strongly influence when and where humid heatwaves occur, making seasonal weather patterns a key driver of heat stress risk in India.
• Kerala is identified as highly vulnerable due to persistent high humidity, heavy rainfall patterns, and coastal climate conditions that amplify wet-bulb temperature stress.
• The study shows that humid heat exposure can trigger health risks like Heatstroke even at temperatures below traditional heatwave thresholds used in current warning systems.
• Coastal and lowland regions face increasing danger as rising global temperatures combine with humidity, reducing safe working hours for outdoor labourers and workers.
• Researchers highlight that India’s heat warning systems still rely heavily on temperature alone, ignoring humidity-based indicators like Wet-bulb temperature and heat index.
• The study suggests that improved forecasting of monsoon-linked humidity patterns could allow early warnings several weeks in advance for better preparedness.
• Experts emphasize urgent adaptation measures such as heat action plans, cooling centers, and revised work schedules to reduce health risks in humid regions like Kerala.