Some groups are at a greater risk of extreme heat problems, including young children, seniors, athletes, and individuals such as outdoor workers and the homeless who are more exposed to weather conditions.
The heat could also affect people with pre-existing health conditions such as respiratory and cardiovascular diseases.
The countries that have seen warmer temperatures in recent weeks often have to deal with added problems, including air pollution in many of their urban areas, said Prof Horton.
Besides physical health, the prolonged duration of heat can affect the mental and emotional aspects.
Heat-related conditions have “massive ramifications” for the healthcare system, particularly in poorer countries that do not have enough medical facilities to treat a large influx of patients, Prof Bowen said.
He added: “We know that with the projections around the increase in intensity and frequency of heatwave events, we must ensure that our healthcare facilities are prepared.”
