climate change

Cities’ adaptation to climate change is not progressing fast enough to protect their inhabitants from increasing heatwaves, infectious diseases and exposure to pollen, which are having an ever-greater impact on the urban population. This is the main conclusion of a study published in The Lancet Public Health, based on 28 indicators from more than 850 European cities, including many in Spain such as Madrid, Barcelona and Valencia. The greatest improvements were observed in cities that increased their green space. The study also suggests that risks are rising more rapidly in southern and eastern Europe.

Summer holidays in Spanish schools are amongst the longest in Europe, and every year the debate resurfaces as to whether their length is appropriate or excessive. Do they affect the knowledge and skills acquired? Could they have an impact on well-being? Do they affect all children equally? How could the summer months be improved for children and teenagers?

The peaks of European mountains such as the Pyrenees or the Sierra Nevada may be gaining plant species as the climate warms, but this apparent increase in biodiversity is masking a growing wave of local extinctions. These are the main conclusions of a study published in the journal Science, which includes Spanish participation and analyses nearly a thousand vegetation plots spread across 62 European mountain peaks. The reason is that higher-altitude mountain regions have gained plant species in recent decades as plants from lower altitudes have expanded up the slopes, but this may mask the decline or disappearance of specialised, high-altitude resident species.

Various models estimate that global temperatures will rise by more than 1.5 °C above pre-industrial levels in the coming years, which will increase the vulnerability of societies and economies to climate change. A new report by the United Nations Environment Programme (UNEP) states that it is still possible to reduce temperatures and meet the targets of the Paris Agreement. The report identifies a trajectory of overshoot, peak and decline as the best option. The key would be to minimise the magnitude and duration of this overshoot and to try to return to below 1.5 °C as soon as possible.

So far this year, up to 20 August, 262,000 hectares have been burnt in Spain, compared with the average of 105,600 hectares burnt between 2015 and 2024. Large-scale wildfires, exacerbated by climate change, are increasing both in frequency and in the area affected. But what happens in the forests after a fire? Can the woodland regenerate on its own? What criteria should be followed? We analyse, with the help of experts, how these ecosystems recover and what measures are taken to protect and restore them.

A team of researchers in Germany has analyzed various factors to estimate the potential annual forest area burned in Europe by the end of the century. According to their findings, in a low-emissions scenario, the area burned would increase by 39%, while it could almost triple in a high-emissions scenario. However, improvements in fire management have the potential to significantly limit these projections. The authors, who published their work in the journal Global Change Biology, point out that “while reducing emissions is essential to lessening the impact of fires, the results also show that improvements in prevention, early detection, and firefighting play a key role in helping to reduce the extent of the affected area."

An international team has analyzed sea surface temperatures in the Atlantic Ocean and at various points in the Mediterranean Sea. The analysis, published by World Weather Attribution (WWA), shows that this year's temperatures have been extraordinary, both in their intensity and how early they have reached such magnitude. This behavior is not only having an ecological impact on marine life, the authors state, but could also exacerbate potentially destructive regional climate events like those that occurred in Valencia in 2024.

Extreme heat is intensifying due to climate change – heat whose hourly fluctuations are not captured by traditional daily temperature indicators. Research published in Nature Climate Change has analysed global hourly data from 1981 to 2023, alongside climate projections through to the end of the 21st century. More than 80 per cent of the world’s land surface showed an increase in heat. Under a high-emissions scenario, the authors predict that, for the period 2070–2099, each hot day could include more than four hours of additional high temperatures compared with current levels (2001–2023). They also predict that non-hot days could see a further three hours of high temperatures, which would likely go undetected by daily measurements. Low- and middle-income countries are the hardest hit, bearing more than three-quarters of current and future heat exposure.

Next Monday, 17 August, COP17 on desertification gets underway in Ulaanbaatar (Mongolia). This is the first of three environmental summits to be held this year. The next event will be in Yerevan (Armenia), where the COP17 on biodiversity will be held from 19 to 30 October, and the year will conclude with the COP31 on climate change, which will take place in Antalya (Turkey) from 9 to 20 November and will be co-chaired by Australia. Why has there been no proposal for a single summit encompassing all three? Would a climate summit held every two years, like those on biodiversity and desertification, be more appropriate? With the United States out of the picture, who is leading them? To answer these and other questions, SMC Spain organised a briefing session with experts who have extensive experience of this type of summit.

Western Europe experienced its hottest June–July on record, according to data from the Copernicus Climate Change Service (C3S). July saw the third and fourth heatwaves since May, marking an exceptional spell of extreme heat this summer. Across much of the region, the drought observed in May and June also persisted and intensified, with exceptionally low rainfall and soil moisture in France, Spain, parts of Germany and the United Kingdom. These hot and dry conditions in Western Europe led to the spread and intensification of last month’s extreme wildfires in countries such as Spain and France, according to the report.