Rising global temperatures are increasing concern about heat as a major health risk.
Heatwaves can place stress on the cardiovascular system, worsen respiratory conditions and increase the danger of dehydration and heatstroke.
Cities are especially vulnerable because dense infrastructure can trap heat, creating urban heat island effects.
Older adults, outdoor workers and people with existing medical conditions are often among the most exposed groups.
Public health systems are responding with cooling centres, warning systems and urban planning strategies designed to reduce heat exposure.
Scientists warn that climate change could make extreme heat events more frequent and intense in many regions.
Experts suggest adapting to heat may become a central part of future healthcare and city planning.
