Srilanka, March 31 -- Heat index, the temperature felt on human body is expected to increase up to 'Caution level' at some places in Northern, North-Central, North-Western Provinces and in Trincomalee, Batticaloa, Colombo and Gampaha districts, the Meteorology Department warned.

The department said those working in job sites should stay hydrated and takes breaks in the shade as often as possible, Indoors: check up on the elderly and the sick, never leave children unattended, limit strenuous outdoor activities, find shade and stay hydrated and wear lightweight and white or light-coloured clothing.

Showers or thundershowers will occur at several places in Western, Sabaragamuwa, Southern and Uva Provinces and in Nuwara-Eliya and Ampara di...