Advisory for Severe Lightning
Issued by the Natural Hazards Early Warning Centre
Issued at 12.00 noon 21 April 2026 valid for the period until 11.30 p.m. 21 April 2026

Thundershowers accompanied with severe lightning are likely to occur in the Western, Sabaragamuwa, Central, North-western, Northcentral, Southern, Uva provinces, and in Mannar, Vavuniya, Ampara, Batticaloa districts after 1.00 p.m.

There may be temporary localized strong winds during thundershowers. General public is kindly requested to take adequate precautions to minimize damages caused by lightning activity.

ACTION REQUIRED:

The Department of Meteorology advises that people should:
 Seek shelter, preferably indoors and never under trees.
 Avoid open areas such as paddy fields, tea plantations and open water bodies during thunderstorms.
 Avoid using wired telephones and connected electric appliances during thunderstorms.
 Avoid using open vehicles, such as bicycles, tractors and boats etc.
 Beware of fallen trees and power lines.
 For emergency assistance contact the local disaster management authorities

WEATHER FORECAST FOR 21 APRIL 2026
Issued at 05.30 a.m. on 21 April 2026 by the Department of Meteorology

Misty conditions can be expected at some places in the Central, Sabaragamuwa, North-central and Uva provinces and in Galle, Matara and Kurunegala districts during the early hours of the morning.

Showers or thundershowers will occur at most places of the island after 1.00 pm. Heavy showers (more…)

Warm Weather Advisory
Issued by the Natural Hazards Early Warning Centre
at 3.30 p.m. on 20 April 2026, valid for 21 April 2026

The Heat index, the temperature felt on human body is likely to increase up to ‘Caution level’ at some places in the Northern, North-central, North-western, Western, Sabaragamuwa, Eastern and Southern provinces and in Monaragala district.

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.

Effect of the heat index on human body is mentioned in the above table and it is prepared on the advice of the Ministry of Health and Indigenous Medical Services.

ACTION REQUIRED

Job sites: Stay hydrated and takes breaks in the shade as often as possible.

Indoors: Check up on the elderly and the sick.

Vehicles: Never leave children unattended.

Outdoors: Limit strenuous outdoor activities, find shade and stay hydrated.

Dress: Wear lightweight and white or light-colored clothing.

Note:
In addition, please refer to advisories issued by the Disaster Preparedness & Response Division, Ministry of Health in this regard as well. For further clarifications please contact 011-7446491.