What is Kallakadal posing threats to coastline in Kerala, Tamil Nadu?

Coastal areas of Kerala and southern parts of Tamil Nadu are expected to encounter the "kallakkadal phenomenon" - a sudden swell of the seas causing rough waves - until 11:30 pm on Monday. 

The Indian National Centre for Ocean Information Services (INCOIS) advises, "Due to the expected intensification of rough seas, it is recommended to avoid danger zone areas as instructed by authorities."

Sea erosion in Thiruvananthapuram, Kerala coast. #seaswells #Kallakadal

An 'Orange Alert' has been issued by INCOIS due to high-energy swell waves along the Kerala and south Tamil Nadu coasts. This phenomenon, locally known as #Kallakadal, poses risks to coastal regions. People… pic.twitter.com/TldXXTQdHP

— All India Radio News (@airnewsalerts) May 5, 2024

INCOIS urges fishermen and coastal residents to heed alerts and stay away from danger zones. "Keeping a safe distance between boats can avoid the risk of collision. The safety of fishing equipment should be ensured," it said in a statement here.

What is Kallakadal?

The term "Kallakadal," meaning "angry sea" in Malayalam, accurately portrays the fierce and unpredictable nature of the ocean during periods of heightened wave activity. These waves have the potential to cause flooding, coastal property damage, and even loss of life. Furthermore, fishing operations may face disruptions.

KSDMA issues guidelines for safety

The Kerala State Disaster Management Authority (KSDMA) has issued directives to district authorities in light of the anticipated swell surge. Individuals sleeping on beaches at night and vendors are advised to avoid coastal areas. With the possibility of swell surge, fishermen and coastal residents are urged to remain vigilant. As sea conditions are expected to worsen, people are instructed to steer clear of designated danger zones as per district authority guidelines.

The KSDMA has advised fishers to secure their fishing equipment, safely moor their vessels at fishing harbors, and maintain adequate distance between boats to prevent collisions. Additionally, individuals are urged to refrain from visiting beaches and engaging in recreational activities along the coast. Furthermore, restrictions will be enforced, prohibiting entry to beaches from 10 pm onwards on Friday.