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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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WMO/WHO Press Conference - 02 November 2023

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