Heatwave alert in India: Impact on toddlers and elderly population

According to the latest forecast done by the India Meteorological Department (IMD), it is said that heatwave to severe heat conditions is likely to continue over the east and south Peninsular regions of India in the next five days. Heatwaves can be dangerous for everyone, but especially for toddlers and the elderly population. How do heatwaves impact these vulnerable groups?