Climate crisis ‘a health crisis’ increasingly deadly for the most vulnerable: WMO, WHO
Amid more frequent extreme weather events and temperature records, human health – particularly in the most vulnerable communities - is increasingly threatened, according to a new multi-agency report coordinated by the UN World Meteorological Organization (WMO).
“The impacts of climate change on health are wide-ranging, affecting the determinants of health from social behaviors to water safety to air quality and food security," said Dr. Joy Shumake-Guillemot from the joint WMO-WHO Office on Climate and Health at the report launch in Geneva on Thursday. She stressed that low and middle-income countries in particular are being "impacted heavily".
The report, which includes input from more than 30 collaborating partners, shows that scientific know-how and resources can make a real difference in people’s daily lives, but are not sufficiently accessible or utilised. The number of medium or large-scale disaster events is projected to reach 560 a year – or 1.5 each day – by 2030. In countries with limited early warning coverage, disaster mortality is eight times higher than in those with substantial to comprehensive coverage.
“The impacts of extreme heat are quite severe, with up to half a million people being impacted with excess mortality related to extreme heat around the world," said Dr. Shumake-Guillemot.
Between 2000 and 2019, estimated deaths due to heat were approximately 489,000 per year, with a particularly high burden in Asia (45 per cent) and Europe (36 per cent).
Climate change is also exacerbating risks of food insecurity. “In the Horn of Africa during the past three years, we had [a] very severe food insecurity situation, which was related to both the heat and drought,” said WMO Secretary-General Petteri Taalas. “Quite often in these episodes when we have heatwaves, we have also fairly poor air quality. For example, in 2003, when we got the 75,000 casualties in in Europe, at the same time, the surface ozone concentrations were very, very high."
According to the report, heatwaves also aggravate air pollution, which is already responsible for an estimated seven million premature deaths every year.
“The real solution will be to stop the cause of the problem, which is the combustion of fossil fuels and this is for the health community, this is extremely important because the combustion of those fossil fuels [is] not only contributing to greenhouse gas emissions, but as well to air pollution,” said Dr. Maria Neira, Director of the Department of Environment, Climate Change and Health at the World Health Organization (WHO). She added that “we are creating conditions for more non-communicable diseases, lung cancer, chronic respiratory infections because of the bad quality of the air we breathe."
According to Dr. Neira, there are not only “immediate consequences because of the disaster, but as well massive displacement. They will maybe be responsible for destruction of the land and agricultural production and therefore we will see malnutrition and massive mental health issues as well."
The transmission of many climatically sensitive infectious vector-, food-, and water-borne diseases is also on the rise. Dengue is the world’s fastest-spreading vector-borne disease, whilst the length of the malaria transmission season has increased in parts of the world.
“If you have all of these extreme weather events, you have global warming, you will have more difficulties to access water services and that will be responsible as well for a massive increase [in] waterborne diseases," Dr. Neira said. "We have seen an increase in cholera outbreaks around the world, by the way."
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STORY: Report State of Climate Services for Health: WMO - WHO”
TRT: 3:00”
SOURCE: UNTV CH
LANGUAGE: ENGLISH
ASPECT RATIO: 16:9
DATELINE: 2 November 2023 - GENEVA, SWITZERLAND
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New data showing that rivers were at their lowest level for decades last year provides further evidence that the climate crisis is real and countries must act immediately to protect themselves from the increasing threat to communities and livelihoods, the UN World Meteorological Organization (WMO) said on Thursday.
The key findings from WMO’s State of Global Water Resources 2025 report covering the hydrological cycle and extreme events in the five-year period to last year:
Highlighting the long-term decline in the Earth’s freshwater storage and glacier melt, WMO Secretary-General Celeste Saulo explained that the planet’s water reserves used to act as a planetary “savings account” that absorbed the occasional dry season, avoiding a water crisis. “One of the central stories of the 2025 report is what is happening to that savings account? And the simple answer is that we are depleting it,” she told journalists in Geneva.
Groundwater reserves are equally stretched and have been in decline since 2014, WMO’s report states, with nearly two-thirds of monitored wells worldwide showing levels lower than the historical norm and indicating a shift “further toward deficit…not recovery”.
“At the same time, we are seeing more water-related disasters,” Ms. Saulo said, while also stressing that the currently strengthening El Niño “will increase the risk of drought in some areas, and flooding in others”.
Glaciers disappearing
In 2025, for the fourth consecutive year, every major glaciated region on Earth lost ice mass, leading to short-term hazards including floods and long-term water insecurity, according to WMO.
Responding to a question about whether the changing global water cycle might have contributed to the deadly Nepal-China flooding disaster, Ms. Saulo explained that melting ice and rock was just one factor in the chain of events that ultimately sent a massive and deadly wall of water and debris downstream on 26 August, killing at least 1,367 people.
“You asked if it could happen again? Absolutely; the problem in this region is that there’s 63,700 glaciers at the last count,” she told a Press Conference in Geneva. “Even if you’re looking with remote sensing with satellites at these glaciers, you might see some faults, you might see some slight shifting, that does not mean necessarily catastrophic collapse. So, in order to plan for this, it’s very, very difficult. But the international community is looking very hard at ways in which we can bring people together to solve some of these monitoring issues.”
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Every major glacier region on Earth lost ice for the fourth consecutive year.
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Some regions with smaller glaciers such as Central Europe, the Caucasus, the western Canada and the United States may already have reached “peak water”, Mr. Jenkinson warned.
“After this point, the glacier gives less meltwater each year simply because there is less ice left to melt. That matters for every community downstream that relies on water during hot, dry summers,” he explained.
Narelle van der Wel, WMO’s Head of Cryosphere Monitoring, Predictions and Services, stressed that while some further glacier loss is unavoidable, the eventual scale of the decline is not predetermined.
“Some glacier loss is inevitable, but total loss of glaciers is not yet inevitable,” she said, pointing to emissions reductions as central to limiting future losses.
Preparing for moving baselines
The report does not attribute every observed change to climate change alone. WMO says pressure on water resources and natural variability also contribute.
Mr. Jenkinson said governments need to prepare for “moving baselines” as historical patterns become less reliable.
“The situation 30 years ago is not where we are today,” he said. Countries, he added, need to prepare “for those changes that have really already arrived”.
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