A warm-weather advisory issued for September 12, 2026 warns that the heat index may rise to the “Caution” level in several parts of Sri Lanka during the daytime.
The advisory covers:
- North-Central Province
- Eastern Province
- Jaffna District
- Kilinochchi District
- Mullaittivu District
- Vavuniya District
- Kurunegala District
- Monaragala District
- Hambantota District
What “heat index” means
The heat index represents how hot conditions may feel to the human body, taking factors such as humidity into account.
It is not necessarily the same as the measured maximum air temperature.
The heat-index value should not be read as the measured maximum air temperature.
Public precautions
People in affected areas should:
- maintain adequate hydration;
- limit prolonged strenuous outdoor activity where possible;
- take additional care with children, older adults and people vulnerable to heat;
- seek shade or cooler surroundings when feeling unwell;
- remain alert to symptoms associated with excessive heat exposure.
The advisory is specific to September 12, 2026.