The first Global Heat Forum opened in Bangkok on 6 October with a package of health evidence, practical tools and calls for investment intended to help governments move from recognising extreme heat as a risk to preparing for it. The four-day meeting has brought together nearly 600 scientists, health experts, business leaders and philanthropists.
Its opening announcements included a global evidence summary on extreme heat and health; an intervention platform drawing on a review of 300,000 academic papers and assessments of more than 80 interventions; a call focused on women’s health; an investment and action roadmap; and the first country-level heat and health assessments for Bangladesh, Bhutan, India and Nepal.
The agenda reflects a widening view of heat as more than a weather problem. Heat can affect health services, workers, homes and infrastructure, while responses require coordination across health, housing, energy, transport and urban planning. The forum’s stated purpose is to identify measures that can be implemented at scale and the financing needed to support them.
Evidence and practical choices
The evidence summary, titled Extreme heat and health: Global evidence for action, brings together research on how heat affects health. An accompanying question-and-answer series addresses practical issues in heat action, including the potential costs of a heatwave.
The What Works Against Heat platform is intended to help decision-makers compare interventions rather than rely on a single prescription. The project says it has reviewed 300,000 academic papers and rated more than 80 measures, spanning areas such as city planning and building design. Its assessments consider strength of evidence, effectiveness, cost, time to benefit and environmental impact, with results organised by climate conditions.
That structure may help officials weigh options against local needs, but a catalogue of evidence does not itself establish that a measure will work equally well in every place. The platform is a resource for decisions; actual effects will depend on design, funding and implementation.
The women’s health call urges governments to protect women and babies from heat-related health impacts. Its focus recognises that health risks and access to information or support can differ across populations. The announcement is a call for action, not evidence that new protections have already been adopted.
Turning plans into delivery
The Roadmap for Investment and Action on Extreme Heat is intended to carry work forward towards the next UN climate conference, COP31. Country-level assessments from the Global Heat Health Information Network’s South Asia Hub add a regional evidence base for Bangladesh, Bhutan, India and Nepal. The forum has described these resources as support for planning; their publication does not mean that national policies, financing or outcomes are already in place.
Addressing the opening, UN Secretary-General António Guterres called on cities to have heat action plans in place by 2030, backed by systems and resources. His appeal places city authorities at the centre of preparing for heat, while stressing that departments including health, housing, energy and transport need to work together.
The World Meteorological Organization’s opening remarks also emphasised action before an emergency: forecasts need to give health services time to prepare, employers time to adjust working hours and communities time to reach people at greater risk. The organisation pointed to the need to agree in advance on triggers for action, responsibilities and funding.
The event is organised by the Global Heat Health Information Network and the World Meteorological Organization with regional, research, philanthropic and health partners. It follows earlier warnings and preparedness work on heat and climate risks, including discussion of El Niño. The Bangkok gathering is a distinct development: its central focus is the launch of evidence and implementation resources, alongside an explicit push to mobilise investment. Whether those tools lead to stronger protection will depend on decisions and delivery by governments, cities and funders after the forum.
