The United Nations Office at Geneva
Multimedia Newsroom
Worsening air quality through heatwaves - WMO
Climate change is having a measurable impact on air quality and therefore human health, meaning the two must be tackled together, the World Meteorological Organization (WMO) said on Wednesday.
“This record-breaking summer sets the scene for the fact that we are seeing more extreme heat, we are seeing more heatwaves. This does have an impact on human health and on air quality,” said Clare Nullis, WMO spokesperson, at a press conference at the United Nations in Geneva.
The 2023 WMO Air Quality and Climate Bulletin noted that high temperatures are not only a hazard by themselves, but they also trigger damaging pollution.
“The coincidence of high temperature and high levels of particulate matter, such as from forest fires or desert dusts, poses a dangerous health risk for large parts of the population in the world,” stressed Lorenzo Labrador, WMO scientific officer.
Echoing that message, Ms. Nullis noted that global sea surface temperatures were “unprecedented” while Antarctic sea ice was “unprecedentedly low for this time of year”.
In addition, August was the hottest on record “by a big margin. It’s the second hottest month ever and this follows July 2023 which was the hottest month on record.”
Climate change is increasing the frequency and intensity of heatwaves. Smoke from wildfires contain chemicals that affect not only air quality and health, but also damage plants, ecosystems and crops.
“The lengthy heatwave in September of 2022 over the northwestern United States, which correlated with large wildfires and a significant degradation in air quality over the region,” said Mr. Labrador.
He added that “during July 2022, a heatwave was observed across Europe, where hundreds of air quality monitoring sites exceeded the World Health Organization ozone air quality guide lined level of a hundred milligrams per meter cube for an eight-hour exposure.”
WMO pointed out in their report that people who live and work in cities experience the most intense conditions when it comes to heat since they are surrounded by tall buildings.
“Air quality and climate change should be studied not as separate subjects but should be studied together”, according to WMO’s Mr. Labrador. “They are inseparable in the sense that many of the gases that are responsible for climate change are also emitted by the same sources that cause air pollution. Furthermore, there is an intricate link in the set of chemical reactions whereby atmospheric pollutants are produced in part from global greenhouse gases.”
WMO released its report ahead of Thursday’s International Day of Clean Air for blue skies.
-ends-
STORY: Worsening air quality through heatwaves - WMO
DURATION (TRT): 2:24"
SOURCE: UNTV CH
LANGUAGE: ENGLISH/NATS
ASPECT RATIO: 16/9
DATELINE: 6 September 2023, GENEVA SWITZERLAND
FORMAT: HYBRID PRESS BRIEFING
- Exterior medium shot: UN flag alley, UN Geneva
- Wide shot: speakers behind podium, attendees at the press conference, screens with speaker
- SOUNDBITE (English) – Clare Nullis, WMO spokesperson: “Global sea surface temperatures are unprecedented. Antarctic sea ice is unprecedentedly low for this time of year and it was the hottest August on record by a big margin. It’s the second hottest month ever and this follows July 2023 which was the hottest month on record.”
- Medium shot: attendees at the press conference
- SOUNDBITE (English) – Clare Nullis, WMO spokesperson: “This record breaking summer sets the scene for the fact that we are seeing more extreme heat, we are seeing more heatwaves. This does have an impact on human health and on air quality.”
- Wide shot: speakers behind podium, attendees at the press conference, screens with speaker
- SOUNDBITE (English) – Lorenzo Labrador, WMO scientific officer: “The coincidence of high temperature and high levels of particulate matter, such as from forest fires or desert dusts, poses a dangerous health risk for large parts of the population in the world.”
- Wide shot: attendees, cameramen/women and sound engineers at the press conference
- SOUNDBITE (English) – Lorenzo Labrador, WMO scientific officer: “The lengthy heatwave in September of 2022 over the northwestern United States, which correlated with large wildfires and a significant degradation in air quality over the region.”
- Close shot: attendee taking notes at the press conference
- SOUNDBITE (English) – Lorenzo Labrador, WMO scientific officer: “During July 2022, a heatwave was observed across Europe, where hundreds of air quality monitoring sites exceeded the World Health Organization ozone air quality guidelined level of a hundred milligrams per meter cube for an eight hour exposure.”
- Medium shot: attendees and cameraman at the press conference, screens with speaker
- SOUNDBITE (English) – Lorenzo Labrador, WMO scientific officer: “Air quality and climate change should be studied not as separate subjects but should be studied together. They are inseparable in the sense that many of the gases that are responsible for climate change are also emitted by the same sources that cause air pollution. Furthermore, there is an intricate link in the set of chemical reactions whereby atmospheric pollutants are produced in part from global greenhouse gases.”
- Medium shot: speakers behind podium at the press conference
- Close shot: attendee taking notes at the press conference
- Close shot: camerawoman and sound engineer at the press conference
Similar Stories
1
1
Edited News | OHCHR , UNOG
UN Human Rights Chief Volker Türk on Friday provided and oral update to the 63rd session of the Human rights Council on Ukraine.
1
1
1
Edited News | OHCHR , UNOG
UN Human Rights Chief Volker Türk on Friday provided and oral update to the 63rd session of the Human rights Council on the human rights situation in Haiti.
1
1
1
Edited News | WHO
Repeated delays in bringing lifesaving medicines, prosthetics and more from Israel into Gaza risk having devastating consequences on Palestinians who urgently need them in the wartorn enclave, the UN World Health Organization (WHO) said on Friday. “A truck full of non-priority supplies or the right supplies arriving too late, doesn't save lives. That's the question that actually matters," said Dr Reinhilde Van De Weerdt, WHO Representative in the OPT.
1
1
1
Press Conferences | OCHA , UN WOMEN , UNHCR , WFP , WHO , WTO , UNEP
OCHA – $160M CERF allocation to 12 underfunded crises; UNHCR – 5.8M refugee children remain out of school amid funding cuts; UN Women – Middle East escalation and food security among women/girls; WHO – Gaza supplies and overall situation; WFP – Yemen food insecurity and impact on global hunger ; UNEP - First International Conference of the Global Framework on Chemicals in Geneva | 16-20 November 2026
1
1
1
Edited News | WHO
DRC: Early access to care and oxygen decisive for Ebola patients’ survival – WHO
In the Democratic Republic of the Congo (DRC), health workers fighting the country’s largest-ever Ebola outbreak are struggling to overcome critical challenges to patient care, the UN World Health Organization (WHO) warned on Tuesday.
1
1
1
Press Conferences | UNHCR , WHO
Yemen's health system nears collapse amid conflict, causing rising casualties and medicine shortages.
1
1
1
Edited News | OCHA , UN
Civilians in Iran are continuing to feel the consequences of months of conflict and military escalation, the UN’s top official in the country has said, as loss of life, damage to civilian infrastructure and mounting economic pressures leave many facing continued uncertainty.
1
1
1
Press Conferences | HRC
Update by the Expert Mechanism to Advance Racial Justice and Equality in Law Enforcement
1
1
1
Edited News | WHO , UNICEF
Aid agencies in Yemen highlighted the growing hunger emergency sparked by renewed fighting between Houthi opposition forces and Government troops, after mobile health clinics reported that hundreds of children displaced by the violence are suffering from the most deadly form of malnutrition.
1
1
1
Press Conferences | WIPO , WHO , UNICEF , UNHCR , IOM , WFP , FAO
WIPO Global Innovation Index 2026 launch and press conference, WHO Composition of influenza vaccines for the 2027 Southern Hemisphere flu season, UNICEF Yemen hunger and malnutrition; UNHCR Sudan displacement into Chad; IOM Ebola and population movements in DRC; WFP emergency food assistance in Nepal; and FAO food loss and waste.
2
1
2
Press Conferences | UNCTAD
Gaza reconstruction needs reach $71.5 billion as Palestinian economy and public finances face severe strain. Latest UNCTAD report documents the loss of decades of development gains, economic collapse in Gaza and tightening economic constraints in the West Bank.
The report identifies three immediate priorities: transferring withheld Palestinian revenues, safeguarding the banking system and aligning reconstruction support with the documented scale of damage and economic losses.
1
1
1
Press Conferences | HRC
Press conference on the situation of human rights in Nicaragua by the UN Group of Human Rights Experts