đ©ââïž The Human Side of Cooling â Evaporation and Public Health
- Melanie Galpin

- Oct 9
- 2 min read

Heatwaves are no longer rare events â they are becoming a seasonal norm. In 2022 alone, extreme heat contributed to over 62,000 deaths in Europe, with the elderly, children, and outdoor workers most at risk.
As cities grow hotter due to the urban heat island effect, the demand for cooling is skyrocketing. But most solutions, like air conditioning, are expensive, energy-hungry, and out of reach for the most vulnerable.
At WaterRoofs, we believe cooling should be equitable, natural, and accessible to all. Thatâs where evaporation comes in.
đĄïž Why Heat is a Health Crisis
Heat isnât just uncomfortable â it can be deadly. High temperatures lead to:
Heat stress & heatstroke: Life-threatening conditions when the body canât regulate temperature.
Respiratory problems: Hot, dry air worsens air quality and increases risks for asthma and lung disease.
Cardiovascular strain: Heat forces the heart to work harder, raising risks for those with existing conditions.
The World Health Organization warns that heat-related mortality is rising fast as global warming accelerates.
đ§ Evaporation: Natureâs Health Shield
Evaporation naturally reduces heat stress by lowering both surface and ambient air temperatures.
WaterRoofs uses micro-channel PET tiles to harness this process:
Retains rainwater and releases it gradually into the air.
Lowers rooftop temperatures by up to 15°C.
Reduces neighborhood air temperatures by 1â5°C.
Restores humidity, making urban air easier to breathe.
Unlike air conditioning, evaporation cools both indoors and outdoors, protecting not just individuals but entire communities.
đ„ A Public Health Benefit at Scale
By bringing evaporative surfaces back into cities, WaterRoofs can:
Protect vulnerable populations â especially the elderly and children.
Reduce hospitalizations during heatwaves by lowering exposure to extreme heat.
Provide low-cost cooling without energy bills, making comfort accessible to all.
Enhance wellbeing by improving air quality and humidity balance.
This makes WaterRoofs not just a climate technology, but a public health intervention.
đ Equity, Access, and Climate Justice
Cooling is not a luxury â itâs a necessity for survival. Yet millions of people cannot afford AC or live in homes unsuited for it.
WaterRoofs provides a climate justice solution:
Passive, low-maintenance, and scalable.
Works in dense urban areas where greening is limited.
Affordable compared to heavy infrastructure or widespread AC installation.
By focusing on people as well as buildings, WaterRoofs delivers health protection where itâs needed most.
â The Takeaway
Evaporation is more than a climate process â itâs a health shield.
WaterRoofs helps cities protect lives, improve wellbeing, and reduce health risks in the face of growing heatwaves.
Because every roof that breathes is a roof that saves lives.
đ© Letâs build cities that protect both the planet and the people who live in them.Â
đ Learn more at www.waterroofs.com or contact us at info@waterroofs.com.



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