Les températures élevées et les événements météorologiques extrêmes représentent un risque important pour la santé des citadins. La chaleur s’accumule et crée des « îlots de chaleur urbains ». C’est ainsi qu’en Suisse, les températures nocturnes dépassent de 5 à 7 °C celles des zones rurales environnantes. La présence d’espaces verts et d’arbres en ville contribue à le réduire et à améliorer le climat urbain. Lisez plus dans cet article Flash.

La canicule qui touche actuellement la Suisse se caractérise par sa durée exceptionnelle et des températures élevées persistantes. Depuis la mi-juin déjà, les journées tropicales se succèdent sans interruption ; une série de records pourrait même être enregistrée à certains endroits. Parallèlement, les températures maximales moyennes devraient se situer, pendant plus de deux semaines, à des niveaux record ou proches de ceux-ci. En savoir plus

 ©   Matthias Huss

From 29 June onwards, Switzerland’s glaciers will have exhausted their snow reserves. Every litre of meltwater now causes them to lose mass – this is Glacier Loss Day. Between the extreme years of 2003 and 2022 alone, 200 square kilometres of ice – an area almost as large as the canton of Zug – have disappeared. This is reflected in the volume of meltwater, as analyses show: although ice loss was more severe in the summer of 2022 than in 2003, less water flowed off the glaciers. Read more here

 ©   IISD/ENB | Kiara Worth

Two weeks of tense UN climate talks in Bonn, Germany, have produced few tangible outcomes as diplomats faced “gridlock”. Negotiators failed to find agreement in numerous areas, such as scaling up global emissions cuts and funding for climate adaptation. In the closing plenary, many diplomats lamented weakened trust in the UN climate process, as it struggled to find its footing in a new geopolitical landscape.  As ever, climate finance was one of the greatest sources of tension between developed and developing countries, influencing the debate around adaptation and trade in the Bonn talks. Many countries criticised “coordinated attacks” on science by those with “fossil-fuel interests”. Some delegates saw progress on a “just transition mechanism” to support communities through decarbonisation as a positive outcome, with a package of texts agreed for the COP31 climate summit in Antalya, Turkey. Read more here

 ©  WMO

Selon l’Organisation météorologique mondiale (OMM), sous l’effet des températures anormalement élevées du Pacifique tropical, des conditions caractéristiques d’un épisode El Niño font leur apparition. Elles devraient influencer les régimes de température et de précipitations à l’échelle mondiale, ce qui augmentera le risque de phénomènes météorologiques extrêmes ces prochains mois. En savoir plus

For the second time, the University of Bern is launching the “Ready to Reduce” ideas competition to support concrete projects aimed at reducing greenhouse gas emissions. The submission date is possible 30. June 2026. They are looking for projects ready for implementation that contribute to reducing greenhouse gases in the following areas: Reuse and circular economy, energy efficiency and energy-saving measures, sustainable mobility, resource efficiency in laboratories and research infrastructures. The Deadline for submitting project ideas is 30 September 2026. Find out more

Le Prix Expo de l’Académie suisse des sciences naturelles (SCNAT) distingue chaque année une exposition remarquable en sciences naturelles en Suisse, en récompensant l’excellence scientifique, la qualité muséographique et la capacité à susciter l’intérêt du grand public. Le Prix est remis annuellement depuis 2003 par l’Académie suisse des sciences naturelles et est doté d’un montant de CHF 10’000. Les candidatures sont désormais ouvertes à début septembre. En savoir plus

Le Réseau « Adaptation » formule, à titre indicatif, les évaluations et recommandations concernant l’utilisation des scénarios climatiques « Climat CH2025 » dans les planifications à moyen et à long terme. Depuis 2025, le Réseau pour l’adaptation aux changements climatiques se concentre principalement sur les défis de l’accentuation des fortes chaleurs et de l’accroissement de la sécheresse estivale. Il collabore avec des acteurs importants pour partager régulièrement les expériences acquises, discuter des points critiques, prendre note des bonnes pratiques et formuler des recommandations concrètes concernant certaines questions d’exécution. En savior plus

Carbon dioxide removal (CDR) will be necessary to limit climate change, accompanying rapid and deep emissions reductions. The State of CDR 3rd Edition collates new insights, explores knowledge gaps and defines core concepts while also aiming to improve the reliability and accessibility of CDR data. This first chapter sets out the role of CDR in climate change mitigation, defines CDR for the purposes of this report, outlines the characteristics of key CDR methods and presents an overview of the report and key improvements from previous editions. Find out more

Europe is warming twice as fast as the global average, making climate resilience increasingly urgent. While all EEA member countries have adaptation policies in place, progress remains uneven. Gaps in climate risk assessments, implementation, financing, monitoring and cross-border cooperation limit preparedness. Shared methodologies, metrics and the systematic assessment of adaptation measures, alongside clearer coordination and risk ownership, are needed to track and advance climate resilience across Europe. This European Environment Agency report provides a consolidated overview of reported national adaptation actions across Europe between 2021 and 2025. Find out more

The Breakthrough Agenda has served as a framework for strengthening international collaboration across major emitting sectors. Participating countries have endorsed shared “Breakthrough” goals to make clean technologies and sustainable practices more affordable, accessible and attractive than their alternatives by 2030 across the power, road transport, hydrogen, steel, cement and buildings sectors. The Breakthrough Agenda establishes an annual cycle to track progress towards these goals, identify where stronger or more co‑ordinated international action is needed, and support collective efforts to accelerate deployment. Find out more 

The Global Justice Report attempts to set out a new vision for global progress in the 21st century: grounding human development and equality in planetary habitability. It explores the conditions under which the world could move toward this horizon and traces an economically and ecologically consistent transition path from 2026 to 2100. Fast decarbonization of energy systems is necessary. But we also need a major shift toward sufficiency – understood as a sharp reduction in labour hours and material footprint and large changes in consumption patterns, food habits, land use, and forest cover. Find out more