A warmer climate raises the baseline from which heatwaves develop. This makes cities intensify heat depend on land use, weather and the infrastructure that stores and moves the resource.
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The deeper explanation
The answer in detail
How do cities intensify heat? is shaped by the forces, choices and constraints described in this collection. The body struggles to cool itself when temperature and humidity remain high.
Why it matters
Heatwaves are a direct public-health risk that cities and employers can reduce through preparation and design.
The wider system behind cities intensify heat
Farms, cities, households and ecosystems draw on the same resource, so decisions about cities intensify heat redistribute access, prices and risk between users.
Insurance, public budgets and trade carry the effects beyond the immediate place: a local shortage or adaptation choice can change food prices, health costs and investment elsewhere.
System lens
What makes this more complicated?
Three layers that help explain what changes the outcome.
Starting conditions
History, resources and institutional capacity set the starting position before the visible outcome appears.
Limits and trade-offs
Rules, capacity and competing priorities limit which responses are practical, even when several options look possible.
Choices and distribution
The outcome depends on who can change those conditions and how its consequences are shared.
Why are extreme heatwaves becoming more dangerous?
Shared background, people, references and other questions for this story collection.
Read the main storyMeet the players
Extreme heatwaves pose significant public health risks influenced by various environmental and social factors.
organization
Intergovernmental Panel on Climate Change
Research and provide assessments on climate change impacts.
Wants toto inform global policy and action on climate change through comprehensive research.
LeverageTheir assessments are widely recognized and used by policymakers worldwide.
Read profile: Intergovernmental Panel on Climate Change
The Intergovernmental Panel on Climate Change (IPCC) assesses the scientific knowledge of climate change, including its impacts on extreme weather events like heatwaves. Their reports guide governments and organizations in developing strategies to mitigate these risks, influencing public health policies and urban planning.
organization
World Health Organization
Address health risks associated with climate change.
Wants toto promote health and well-being in the context of climate-related health risks.
LeverageWHO's global reach allows them to influence health policies and practices in various countries.
Read profile: World Health Organization
The World Health Organization (WHO) focuses on the health impacts of climate change, including dangers posed by extreme heat. They provide guidelines for public health responses to heatwaves, emphasizing preparedness and community awareness, and identifying vulnerable populations.
organization
UN-Habitat
Promote sustainable urban development.
Wants toto improve urban living conditions and resilience against climate impacts.
LeverageTheir expertise in urban planning influences local and national policies on climate adaptation.
Read profile: UN-Habitat
UN-Habitat works on sustainable urban development, focusing on how cities can adapt to climate change, including the intensification of heat. Their initiatives aim to create urban environments that mitigate heat risks through better design and infrastructure.
government
City Governments
Implement policies to protect public health during heatwaves.
Wants toto safeguard community health and well-being during extreme heat events.
LeverageCity governments can mobilize resources and coordinate responses to heat emergencies.
Read profile: City Governments
City governments are responsible for enacting and enforcing policies that protect residents from extreme heat dangers. They implement measures such as early warning systems and public cooling centers, directly impacting community responses to heatwaves.
organization
National Health Service
Monitor and respond to health impacts of heatwaves.
Wants toto protect public health through monitoring and intervention strategies.
LeverageTheir expertise allows them to influence health policies and community preparedness efforts.
Read profile: National Health Service
The National Health Service (NHS) assesses health risks associated with extreme heat and develops strategies to mitigate these risks. They conduct research and implement community health initiatives, ensuring effective interventions are in place during heatwaves.
Sources & visual credits
Flags and logos identify the actors; they do not imply endorsement.
Story collection
6 questions to explore
Open a question to read its explainer and follow the linked questions in this collection.
A quick glossary for this collection.
HeatwaveA period of unusually high temperatures for a place and season.
HumidityThe amount of water vapour in the air.
Heat stressPhysical strain caused by excessive heat.
Wet-bulb temperatureA measure combining heat and humidity relevant to human cooling.
Urban heat islandExtra warmth created by built-up areas.
VulnerabilityThe likelihood of being harmed by a hazard.
Sources for the whole story
How we work ↗Sources to start with
These references support the story collection as a whole.
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