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Death toll 280 & counting: what is the science behind Kerala’s deadly landslides?

Haunting images reveal uprooted trees, homes reduced to rubble, and bridges shattered, all swallowed by muddied waters. Each scene tells a story of loss, despair, and the enduring resilience of those affected

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Image credit: PRO Defence Kochi

The landslides in Wayanad, a tourist-friendly district in the southern Indian state of Kerala, are rapidly becoming one of the most devastating natural disasters the region has ever seen. Entire areas in Chooralmala and Mundakai villages have been washed away, with local media reporting the destruction of over 250 homes. Tragically, the death toll has surpassed 280, marking a grim chapter in the region’s history.

The disaster, the worst since the devastating floods of 2018, has left a heart-breaking trail of destruction. Haunting images reveal uprooted trees, homes reduced to rubble, and bridges shattered, all swallowed by muddied waters. Each scene tells a story of loss, despair, and the enduring resilience of those affected.

Nestled in the rugged terrain of the Western Ghats, Wayanad is renowned for its stunning vistas and is a cherished tourist destination, attracting over 100,000 visitors each year. This picturesque district, home to indigenous tribes and dotted with lush tea and cardamom estates, holds a unique charm. Yet, beneath its beauty lies a history of vulnerability, and prone to landslides.

A 2011 report by a panel of experts led by ecologist Madhav Gadgil classified the entire Wayanad region as “fragile, medium fragile, and less fragile,” highlighting its susceptibility to landslides. This designation underscores the delicate balance of this ecologically sensitive area, where the enchanting landscape masks the underlying risks faced by its resilient inhabitants.

Indian Army Columns along with NDRF, State rescue teams, CoastGuard, IndianNavy and IAF relentlessly working to address the crisis in Wayanad/ Image credit: Southern Command Indian Army

In the past decade alone, landslides have claimed the lives of 255 people in Kerala. In 2018, 109 people died in landslides, and in 2020 and 2021, around 182 lives were lost to these disasters. August 2020 saw a particularly deadly landslide in Pettimudi, which resulted in 66 fatalities.

Understanding Landslides

Landslides, also known as landslips, encompass a dramatic and diverse array of ground movements that can reshape landscapes in an instant. These natural events, ranging from rockfalls and mudflows to slope failures and debris flows, occur across various environments. Whether cascading down steep mountain ranges, eroding coastal cliffs, or shifting underwater as submarine landslides, these movements highlight the dynamic and unpredictable nature of the terrain. As communities and scientists grapple with their impacts, the stories behind these powerful geological forces continue to unfold.

While gravity is the main force behind landslides, various factors influence slope stability, creating conditions that make a slope vulnerable to failure. Often, a specific event like heavy rainfall, an earthquake, or construction activity triggers a landslide, though the precise cause isn’t always identifiable.

Human activities often exacerbate landslides. Urban sprawl, mining, and deforestation contribute to land degradation, reducing soil stabilization by vegetation. Additionally, global warming and other environmental impacts increase the frequency of extreme weather events, further triggering landslides.

The Catastrophe in Wayanad

Mundakai, the epicentre of a series of landslides, received 572 mm of rain in 48 hours. According to the India Meteorological Department, rainfall exceeding 204.4 mm per day is considered extremely heavy. Experts attribute the landslide in the Mundakai region to this heavy rainfall. In 2019, the Puthumala landslide occurred just two to three kilometres from the current disaster site.

Dr. S. Abhilash from the Cochin University of Science and Technology highlighted the region’s geographical vulnerability. He stated in a video shared on the university’s official Facebook page that heavy nighttime rain was the primary cause of the landslide.

The phenomenon, technically known as a mesoscale mini cloudburst, involves 15 to 20 cm of rain falling within two to three hours. Such events are now occurring in North Kerala, significantly impacting the region

In the past two weeks, the Konkan region (a stretch of land by the western coast of India) experienced heavy rainfall due to a low-pressure area from the Gujarat coast to North Kerala. North Kerala received 50 to 70 percent more rain than usual during this period, with areas including Wayanad recording over 24 cm of rain. The thickening of clouds in the southeast Arabian region contributed to this heavy rainfall.

This phenomenon, technically known as a mesoscale mini cloudburst, involves 15 to 20 cm of rain falling within two to three hours. Such events are now occurring in North Kerala, significantly impacting the region.

Mesoscale Cloudbursts and Kerala Floods

An earlier study published in Science Direct linked mesoscale cloudbursts to the 2019 Kerala floods. Researchers at the Advanced Centre for Atmospheric Radar Research (ACARR), Cochin University of Science and Technology (CUSAT), observed that rainfall exceeding 50 mm in two hours was reported in many places from 8 a.m. to 10 p.m. on August 8, 2019.

The Western Ghats, which run through Kerala, are prone to frequent landslides during the biannual monsoon seasons. The Gadgil Committee report classified areas like Kavalappara in Malappuram district and Puthumala in Wayanad district, which experienced fatal landslides in 2020, as Ecologically Fragile Land (EFL). Climate change exacerbates these issues.

Kerala has faced significant challenges due to climate change in recent years. The state endured a severe drought in 2015, followed by the devastating Ockhi cyclone in 2017. In 2018 and 2019, massive floods and landslides wreaked havoc.

The extreme rainfall of August 2019, which caused landslides and mudslides, leading to downstream flooding, was a ‘mesoscale cloudburst’—a rare phenomenon in Kerala usually seen in North India, according to the study published in ScienceDirect.

Given the increasing intensity of rainfall, the probability of landslides in the Western Ghats’ high to mid-land slopes during the monsoon seasons rises. Human intervention, primarily for crop cultivation, has altered the Western Ghats, making the region more prone to landslides of various scales.

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Health

IITK Researchers Unveils Key Receptor Structure for Cancer and Respiratory Treatments

The team successfully visualized the atomic structure of CXCR2, a crucial human receptor involved in the progression of cancer and respiratory diseases

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GPCR Lab. Image credit: By special arrangement

Researchers from the Department of Biological Sciences and Bioengineering at the Indian Institute of Technology (IIT) Kanpur have made a path breaking discovery that could pave the way for new treatments for cancer and respiratory diseases. The team successfully visualized the atomic structure of CXCR2, a crucial human receptor involved in the progression of these diseases. Their findings, published in the prestigious journal Molecular Cell, offer a new perspective on targeting this receptor for therapeutic intervention.

CXCR2 is a key receptor in the immune system, involved in directing immune cells to infection and injury sites through interaction with chemokines—small signaling proteins. CXCR2’s role in inflammatory disorders and cancers such as chronic obstructive pulmonary disease (COPD), asthma, atherosclerosis, and pancreatic cancer makes it a promising target for new drugs.

Using advanced cryogenic-electron microscopy (cryo-EM), the IIT Kanpur researchers captured unprecedented details of the receptor’s “lock-and-key” mechanism, shedding light on how CXCR2 interacts with multiple chemokines. This discovery addresses a fundamental question in biomedical science about how a single receptor can bind to various chemokines and trigger biological responses. The visualization also opens up opportunities for designing novel therapeutics.

“Our findings provide a molecular blueprint for designing next-generation therapeutics that can precisely target CXCR2 and potentially reduce its role in cancer and respiratory diseases. By visualizing this receptor in its active state, we now have the opportunity to develop highly specific inhibitors that can disrupt its function, potentially leading to significant advancements in treatment strategies,” said Professor Arun Kumar Shukla, the lead investigator of the study at IIT Kanpur.

The research team at IIT Kanpur includes Shirsha Saha, Saloni Sharma, Manisankar Ganguly, Nashrah Zaidi, Divyanshu Tiwari, Nabarun Roy, Nilanjana Banerjee, and Ramanuj Banerjee. Their work also involved collaboration with experts from the University of Tokyo, Japan—Fumiya Sano, Hiroaki Akasaka, Takaaki Kobayashi, Yuzuru Itoh, Wataru Shihoya, and Osamu Nureki—along with Andy Chevigne from the Luxembourg Institute of Health.

This study was funded by the DBT Wellcome Trust India Alliance, Science and Engineering Research Board (SERB), Indian Council of Medical Research (ICMR), and LADY TATA Memorial Trust.

Building on this discovery, the IIT Kanpur team is now developing small molecules and antibodies aimed at targeting CXCR2. These therapeutics will undergo laboratory testing, followed by animal studies, bringing the team closer to offering innovative treatments for cancer and respiratory diseases. This achievement further underscores IIT Kanpur’s commitment to pioneering research that has the potential to revolutionize global healthcare and biomedical innovation.

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Society

Is India’s Clean Cooking Gas Model the Future for the Global South?

The Indian model, backed by smart subsidies and sustainable policies, provides a scalable solution for developing nations striving for clean cooking access

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Image by Aristal Branson from Pixabay

At the just concluded India Energy Week 2025 (February 11-14), India’s Union Minister of Petroleum and Natural Gas, Hardeep Singh Puri, chaired a Ministerial Roundtable on Clean Cooking, where India’s success in providing universal access to clean cooking gas became a key focal point. The Minister emphasized that India’s model for clean cooking gas is not only a success story but also a replicable blueprint for the Global South, offering solutions to nations facing similar energy access challenges.

“India’s clean cooking gas revolution is a game-changer,” said Puri. He pointed out the key factors behind this success: targeted subsidies, strong political will, the digitization of distribution networks by Oil Marketing Companies (OMCs), and nationwide campaigns to shift cultural practices towards clean cooking.

The session brought together representatives from Brazil, Tanzania, Malawi, Sudan, Nepal, and key industry leaders, including the International Energy Agency (IEA), Total Energy, and Boston Consulting Group (BCG). These nations, all striving to enhance energy access for their populations, were eager to learn from India’s achievements.

Under India’s popular government scheme Pradhan Mantri Ujjwala Yojana (PMUY– Prime Minister’s Lightening Scheme), beneficiaries receive LPG access at a highly affordable cost of just 7 cents per day, while other consumers can access clean cooking fuel at 15 cents per day. “This affordability has been a game-changer in driving widespread adoption,” added Shri Puri, underlining the pivotal role of subsidies in overcoming financial barriers to clean cooking.

International representatives shared their nations’ efforts to transition to clean cooking solutions. Dkt. Doto Mashaka Biteko, Deputy Prime Minister and Minister of Energy of Tanzania, outlined the country’s strategy to transition 80% of households to clean cooking by 2030, relying on subsidies and a mix of energy sources, including LPG, natural gas, and biogas. Despite this ambition, he noted challenges such as financing constraints, infrastructure costs, and the need for regulatory reforms to encourage private-sector participation.

Similarly, Dr. Mohieldien Naiem Mohamed Saied, Minister of Energy and Oil, Sudan, emphasized the need for private-sector involvement to overcome gaps in LPG supply, particularly as Sudan still imports much of its energy. He stressed the importance of encouraging local cylinder production and ensuring cost-effective imports to drive broader adoption.

Mary Burce Warlick, Deputy Executive Director of the IEA, recognized India’s success as a model that offers valuable lessons for other nations grappling with issues of affordability, access, and infrastructure. She emphasized the role of concessional financing and public-private partnerships (PPP) in scaling up clean cooking access. Addressing cultural acceptance and regulatory adjustments, such as tax reductions, were also highlighted as critical factors for large-scale adoption.

Rahool Panandiker, Partner at Boston Consulting Group (BCG), further underscored the effectiveness of India’s clean cooking transformation. He attributed the success to the strong political commitment, effective subsidy targeting, and robust public awareness campaigns. Panandiker also credited India’s Oil Marketing Companies (OMCs) for enabling last-mile LPG delivery through digital platforms, making adoption seamless. He also stressed the importance of refining the cylinder refill model to ensure sustained usage while balancing affordability with economic sustainability.

In addition to LPG, the roundtable explored the potential of alternative clean cooking technologies. Puri addressed the potential of solar cookers in expanding clean cooking solutions across the Global South. He highlighted that IOCL’s advanced solar cookers, priced at approximately $500 per unit, could be a viable solution, though the price point remains a challenge for widespread adoption. “Leveraging carbon financing and collaborating with the private sector can drive costs down and make solar cooking a viable alternative for millions,” he stated.

This initiative aligns with India’s broader efforts to diversify clean cooking options beyond LPG, further reinforcing its commitment to reducing reliance on traditional biomass fuels and cutting carbon emissions. The government’s focus on solar cooking options aims to ensure a more sustainable future for energy access, particularly in remote and underserved areas.

“The Indian model, backed by smart subsidies and sustainable policies, provides a scalable solution for developing nations striving for clean cooking access,” Puri said. He also stressed that achieving universal clean cooking access is not merely an economic imperative but a moral one, given the severe health and environmental impacts of traditional biomass cooking.

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Green Energy

India Strengthens Clean Energy Initiatives at India Energy Week 2025

These clean energy projects are part of India’s broader strategy to diversify its energy sources and strengthen its energy security while promoting sustainability

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Image credit: PIB

At the India Energy Week 2025, India underscored its commitment to a sustainable and clean energy future through several strategic partnerships and agreements. Minister of Petroleum and Natural Gas, Hardeep Singh Puri, highlighted the importance of these initiatives in driving India’s transition to a greener energy landscape.

A key development in the clean energy sector was the partnership between India’s public sector firm BPCL and Eco Wave Power of Israel, which aims to establish India’s first wave energy pilot project in Mumbai. The project will utilize wave energy converter technology, marking a significant step in the country’s exploration of renewable energy sources.

In the biofuel sector, BPCL also signed an MoU with the National Sugar Institute, Kanpur, to scale up the production of sweet sorghum-based bioethanol. This collaboration will help build capacity for both farmers and industry partners, supporting India’s drive to increase the share of biofuels in its energy mix.

These clean energy projects are part of India’s broader strategy to diversify its energy sources and strengthen its energy security while promoting sustainability. Through these initiatives, India is reinforcing its position as a key player in the global clean energy transition.

Minister Puri emphasized that these agreements are a testament to India’s commitment to securing affordable, sustainable energy and fostering international collaborations in cutting-edge energy solutions. These partnerships will help achieve India’s energy transition goals, ensuring a resilient and sustainable energy future for the nation.

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