The Meteorology Department has issued a heat Index Advisory for tomorrow (08) for the North-western and Southern provinces and Rathnapura, Anuradhapura, Mannar, Vavuniya and Mullaitivu districts.Heat index, the temperature felt on the human body is expected to increase up to ‘Caution Level’ at some places in North-western and Southern provinces and in Rathnapura, Anuradhapura, Mannar, Vavuniya and Mullaitivu districts, it said.As per the advisory, under this level of temperature, fatigue is possible with prolonged exposure and activity, while continuing activity could result in heat cramps, the Department warned.Thus, members of the public have been advised to stay hydrated, take breaks in the shade as often as possible and limit strenuous outdoor activities.

They were also requested to check up on the elderly and the sick, never leave children unattended inside vehicles and to wear lightweight and white or light-colored clothing.The Heat Index Forecast is calculated by using relative humidity and maximum temperature and this is the condition that is felt on your body.

This is not the forecast of maximum temperature.

It is generated by the Department of Meteorology for the next day period and prepared by using global numerical weather prediction model data.