News
Warming Indian Ocean fuels intensifying humid heat waves in South Asia
Warming coastal waters emerge as primary driver of large-scale humid heat waves
Rising sea surface temperatures in coastal waters are driving 50 to 64 percent of the increase in large-scale humid heat waves, according to new research. The study, from researchers at the Potsdam Institute for Climate Impact Research (PIK), Princeton University and Sun Yat-sen University, implies that coastal sea surface temperatures could be a potential early warning indicator for widespread humid heat extremes. The paper is published in the journal Nature Geoscience.
Humid heat waves have intensified rapidly in recent decades and are projected to worsen, raising the risk of heat-related mortality. Previous research has indicated that even healthy people can succumb to wet bulb temperatures—a measure combining heat and humidity—above 31.5°C, when the body is no longer able to cool itself by sweating. However, the widespread occurrence of humid heat waves across large regions, like the 2023 heat wave in Asia, has so far remained poorly understood.
“We see a strong link between warming coastal waters and clustered hot, humid extreme events, especially in the tropics, where oceans supply more moisture to the atmosphere, which is then transported to land, amplifying the heat,” says lead author and PIK scientist Fenying Cai. “In regions further from the equator, combined land-ocean warming, linked to large-scale atmospheric wave patterns, also plays an important role.”
Analyzing climate data from 1982 to 2023 using a complex network approach, the international research team uncovered strong land-ocean linkages. For example, warming Indian Ocean waters are closely tied to rising humid heat risks in South Asia and the Middle East, while tropical North Atlantic Ocean warming intensifies risks in northern South America. The study also shows that these ocean influences are stronger for large-scale events than for isolated local heat waves.
“Better understanding these land-ocean interactions can help to improve climate adaptation strategies. Crucially, coastal sea surface temperatures emerge as a potential early warning indicator for widespread humid heat extremes,” says co-author and PIK scientist Jürgen Kurths.
Latest News
Heat Index at Caution Level in the Western, Sabaragamuwa, Southern, Eastern, North-western, Northern and North-central provinces and in Monaragala district
Warm Weather Advisory
Issued by the Natural Hazards Early Warning Centre
Issued at 3.30 p.m. on 31 March 2026, valid for 01 April 2026.
The Heat index, the temperature felt on human body is likely to increase up to ‘Caution level’ at some places in the Western, Sabaragamuwa, Southern, Eastern, North-western, Northern and North-central 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.
News
Urea shortage threatens Yala harvest: Experts
Govt. rations stocks as imports falter
By Ifham Nizam
The government faces a looming fertiliser crisis ahead of the 2026 Yala season, with a sharp shortfall in urea threatening paddy yields and food security.
Experts have warned that the fertiliser shortage will take its toll on the yala harvest.
With just over 100,000 tonnes of fertiliser in stock by early March—barely enough for paddy cultivation alone—and more than half of expected imports either cancelled or delayed, the government has moved to ration supplies through Agrarian Service Centres, based on last year’s consumption.
Leading crop scientist Professor Buddhi Marambe has warned that while rationing is unavoidable, it will reduce productivity. “Even last season we applied below recommended levels. This year, the gap will be worse,” he said.
Authorities are prioritising paddy, followed by maize and tea, as limited stocks are stretched across crops.
However, experts estimate yields could fall by 15–20% if nutrient shortages persist—raising the risk of higher food prices in the months ahead.
The crisis has been worsened by global disruptions, including Gulf conflict affecting fertiliser shipments and precautionary export restrictions by key suppliers, such as China.
Although the Government is pursuing deals with countries like Russia, supplies remain uncertain.
With global urea prices surging and production costs rising, smallholder farmers are expected to be the hardest hit.
“This is a wake-up call,” Prof. Marambe said, urging urgent steps to build buffer stocks and strengthen Sri Lanka’s long-term food security strategy.
News
2025 property grab: Court orders JVP to hand back Yakkala office to FSP
By Shamindra Ferdinando
Frontline Socialist Party (FSP) spokesman Pubudu Jayagoda says the Gampaha Magistrate’s Court order that the ruling JVP hand back the FSP’s Kirindiwela office, grabbed by a group of JVP politicians on 02 September, 2025, has shown that the government cannot undermine the law.
Jayagoda said that the FSP had been compelled to move the court against the JVP as the Gampaha police refused to intervene due to political pressure. “They probably thought we were going to give up that office. Perhaps, the ruling party felt they could forcibly occupy other FSP offices,” Jayagoda said.
FSP’s Administrative Secretary Chamira Koswatta and trade unions, which operated from the Salmal Garden office, sought the court intervention to confirm the ownership of that building in the FSP. The court initially transferred the building to the police and issued a directive to law enforcement authorities to remove the JVP/NPP from that building.
Among the 20 respondents was Tilvin Silva, General Secretary of the JVP. Those now identified themselves as FSP quit the JVP in 2011 and later formed their own party.
Gampaha Additional Magistrate Shilani Perera on Monday ruled that the legitimate owner was the FSP. The Magistrate ruled that the FSPers had been forced out of that office, illegally.
Jayagoda said that the FSP considered the court ruling a victory for democracy and a devastating blow to the increasingly authoritarian JVP/NPP rule.
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