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Quechua girls admire Andean mountain views on the Ausungate trail. Cusco, Peru
Photo:Mark/Adobe Stock


Glaciers, an essential source of life around our mountains

Glaciers, vast reserves of ice and snow found across the planet, are far more than frozen landscapes - they are lifelines for ecosystems and communities, holding around 70 percent of the world's freshwater.

Their accelerated melting represents not only an environmental crisis but also a humanitarian one, threatening agriculture, clean energy, water security and billions of peoples’ lives. Their retreat, driven by rising global temperatures, is a stark indicator of the climate crisis. Melting glaciers and thawing permafrost increase risks such as floods, glacier lake outburst floods, landslides or enhanced erosion and sediment, endangering downstream populations and critical infrastructure.

This International Day of Mountains, with the theme “Glaciers matter for water, food and livelihoods in mountains and beyond”, highlights the critical role mountain regions play as a key source of global freshwater and calls for immediate measures to avoid the glaciers’ disappearance.

Help us spread the message!

FAO leads the efforts for . Discover all the materials they have prepared and use them freely to help amplify the message about the need to care for our mountains and their glaciers.

Did you know?

  • Nearly 2 billion people—including many Indigenous Peoples—depend on water from mountains for their essential daily needs, livelihoods and cultural practices.
  • Five of the past six years have seen the most rapid glacier retreat on record. Some 600 glaciers have already disappeared and many more will vanish if temperatures continue to rise.
  • Today over 15 million people globally are highly vulnerable to flooding from glacier lakes.

Don't worry, you don't have to go very equipped or spend money. to the Carpathian Mountains, the Hindu Kush-Himalaya region, the Tian Shan Mountains, and the Virunga Mountains. You will be amazed by everything you will learn!

  join report on water and sanitation is launched every year on World Water Day, exploring the same theme as World Water Day, and giving policy recommendations to decision-makers by offering best practices and in-depth analyses. The 2025 edition is titled ‘Water Towers: Mountains and glaciers’.

an abstract illustration of people engaged in an event

International days and weeks are occasions to educate the public on issues of concern, to mobilize political will and resources to address global problems, and to celebrate and reinforce achievements of humanity. The existence of international days predates the establishment of the United Nations, but the UN has embraced them as a powerful advocacy tool. We also mark other UN observances.