The devastating floods in Nepal have once again highlighted how climate change is changing the risks associated with extreme weather. The disaster affected communities, infrastructure and health services, while scientists and international agencies continue to examine the wider climate factors behind increasingly dangerous events.
The August 26 floods affected several districts in central Nepal, damaging homes, roads, bridges, health facilities and hydropower infrastructure.
Extreme Weather Is Becoming a Bigger Threat
Climate change does not simply mean higher temperatures. A warmer climate can influence rainfall patterns, heatwaves, droughts and other forms of extreme weather.
Recent global temperature data has also underlined the scale of the problem. August 2026 was reported as one of the hottest months ever recorded globally, with temperatures more than 1.5°C above the pre-industrial average.
El Niño Adds Another Layer of Risk
The current El Niño event is expected to become particularly strong. According to the World Meteorological Organization, it could significantly alter rainfall and temperature patterns across different parts of the world through early 2027.
El Niño does not cause every individual flood or heatwave, but it can influence the background climate conditions in which extreme events develop.
Floods Can Quickly Become a Health Emergency
The danger does not end when floodwaters begin to recede.
Damaged sanitation systems, contaminated water, crowded shelters and disrupted healthcare can increase the risk of infectious diseases. WHO says Nepal’s flood-affected areas face risks including diarrhoeal and respiratory illnesses, unsafe water and food, and vector-borne diseases.
Early Disease Detection Becomes Crucial
Nepal has strengthened disease surveillance following the floods. Health teams are monitoring symptoms and unusual disease patterns so that potential outbreaks can be detected quickly.
WHO says surveillance systems are being used to monitor conditions including acute gastroenteritis, respiratory symptoms, dengue, malaria and other health threats.
Mountain Regions Face Multiple Climate Risks
The Himalayan region is particularly vulnerable because communities can face several hazards at once, including intense rainfall, floods, landslides, glacier-related events and changing temperatures.
The consequences can extend beyond immediate loss of life, affecting roads, tourism, energy infrastructure, agriculture and access to healthcare.
The Climate Crisis Is Also a Health Crisis
The Nepal disaster illustrates why climate change should not be viewed only as an environmental issue.
Extreme heat can put additional pressure on the human body, while floods can damage healthcare infrastructure and create conditions favourable to disease transmission. Communities already facing limited resources can be especially vulnerable.
Preparing for a More Uncertain Climate
Better early-warning systems, stronger infrastructure, reliable weather monitoring and rapid healthcare responses can reduce the impact of extreme events.
The challenge is not only reducing greenhouse-gas emissions but also helping vulnerable communities prepare for climate risks that are already affecting them.
Nepal Offers a Wider Warning
Nepal’s experience is a reminder that climate-related disasters can create a chain reaction: an extreme event can damage infrastructure, displace communities, interrupt healthcare and create secondary health risks.
As El Niño strengthens and global temperatures remain unusually high, climate preparedness is becoming increasingly important for countries around the world.