In a dam induced tragedy, six people died, of them four bodies have been found and two more are being searched for. This happened after gates of the Markonahalli dam across Shimsha river (a 221 km long tributary of Cauvery River) in Mandya district in Karnataka suddenly opened on Oct 7 at around 3.30 pm. The tragedy occurred in a village near Yadiyur in Kunigal taluk of Tumakuru district on the border of Tumakuru and Mandya districts, about 100 km from Bengaluru. The Hindu reported earlier in Oct 2000 that the dam gates are poorly maintained.
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High Rainfall days in India’s districts in Sept 2025
An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for the month of September 2025 shows that there were 417 (546 in Sept 2024, 406 in Sept 2023[i], 417 in Sept 2022[ii] and 489 in Sept 2021[iii]) instances when district rainfall of a day was above 50 mm. Such high rainfall instances included 376 (438, 330, 365 and 374 in Sept 2024, Sept 2023, Sept 2022 and 2021 respectively) instances in Sept 2025 when rainfall was 50-100 mm, 34 (73, 64, 47 and 84 in Sept 2024, Sept 2023, Sept 2022 and 2021 respectively) instances in Sept 2025 when it was 100-150 mm, 4 (30, 10, 3 and 20 in Sept 2024, Sept 2023, Sept 2022 and 2021 respectively) times in Sept 2025 when it was 150-200 mm and 3 (5, 2, 2 and 11 in Sept 2024, Sept 2023, Sept 2022 and 2021 respectively) instances in Sept 2025 when rainfall in a day was above 200 mm.
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Oct 2025: Bhutan’s Tala Dam Overtopped
In a major scary incident, the Tala Dam on Wangchhu River in Chukha district of south Bhutan has overtopped for the first time ever, on Oct 5 following unprecedented rainfall in western Bhutan, prompting flood warnings for downstream areas in India’s north Bengal. Bhutan’s NCHM confirmed that DGPC reported that the dam gates failed to open, leading to river water flowing over the dam, considered most dangerous situation for any dam as dams are not designed for such an eventuality.
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DRP 061025: Dangers of expediting Hydro Projects in the Himalayas
(Feature Image: Drone image of the Teesta III dam in Sikkim, taken from Chungthang town looking downstream. Image by Praful Rao of Save the Hills.)
According to a report in the National Daily, the Centre has decided to hire outside experts on fixed contracts to evaluate designs of planned hydropower projects, a move aimed at speeding up construction of several dams in the pipeline, an official said on Oct 1. The Union Govt plans to expedite construction of a slew of hydroelectric projects, especially in Jammu & Kashmir and the northeastern state of Arunachal Pradesh.
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National Dolphin Day 2025: Deaths, Threats, Conservation Efforts related to Gangetic Dolphins
(Feature Image: Carcass of a Gangetic dolphin found on Ganga river bank in Sahibganj district on Oct. 02, 2025)
Oct. 5 is marked as National Dolphin Day since 2022 after a decision by the NBWL in its 67th meeting in March 2022. Earlier the day was designated as Ganga River Dolphin Day. Bihar has been celebrating Oct. 5 as ‘Dolphin Day’ for the past many years. In May 2010, the MoEF had notified the Gangetic Dolphin as ‘National Aquatic Animal’ and in Aug. 2022 launched the Project Dolphin.
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Rivers in Extreme Floods During SW Monsoon 2025
This is the summary report of Highest Flood Levels (HFL) breach incidents which we could document from CWC’s flood monitoring website during South West Monsoon Season 2025. The monthly reports for HFL breach incident for July 2025, August 2025 and September 2025 can be seen by clicking the hyperlinks and the detailed final report can be seen here. SANDRP’s previous reports on the subject can be seen here: HFL breach incidents in 2018, 2019, 2020, 2021 (I), 2021 (II), 2022 (I), 2022 (II), 2023, and 2024.
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Rivers Flowing in Extreme Floods in September 2025
(Feature Image: Yamuna river in severe flood at Mawi site in Kairana, UP on Sept. 02, 2025)
We have been able to observe river attaining new Highest Flood Level (HFL) at least at 18 flood monitoring sites of the Central Water Commission (CWC) in the last month of South West Monsoon 2025. These 18 sites are spread over 7 States & UT, including Jammu & Kashmir (6 sites), Maharashtra (4 sites), Uttar Pradesh (3 sites), Haryana (2 sites), Madhya Pradesh, Telangana and Karnataka (1 each site) comprising 5 river basins including Indus (6), Ganga (6), Krishna (3), Tapi (2) and Godavari (1).
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SW Monsoon 2025: District wise rainfall in India
In the just concluded South West Monsoon 2025, India received 937.2 mm (934.8 mm in SW Monsoon 2024, 820 mm in SW Monsoon 2023, 925 mm in SW Monsoon 2022[i]) rainfall, about 107.9% (107.6% in 2024, 94.45 % in 2023, 106.5% in 2022) of the Normal SW Monsoon rainfall of 868.6 mm as per India Meteorological Department (IMD). This rainfall is categorised as normal rainfall. The rainfall in SW monsoon 2025 is 5th highest since 2001 and 38th highest since 1901.
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DRP 290925: Should Punjab & HP not have decisive say in Operations of Bhakra & Pong dams during Monsoon?
One of the key issues that comes up from the reports this week is regarding Punjab and Himachal Pradesh having greater say in operation of Bhakra and Pong dams during the monsoon. Particularly since when these dams are mismanaged as it happened once again during the SW Monsoon 2025, leading to the dams contributing to worsening the flood disaster in Punjab. The demand is legitimate, considering that these two states are the ones that will be positively or negatively affected when the Bhakra and Pong dams are properly or improperly operated during monsoon.
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Lippa Villagers Blame Kashang HEP for Artificial Lake in Sutlej Basin
(Feature Image: Sept. 07, 2025 pics showingg houses submerged in artificial lake in Lippa village)
It has been over three weeks since an artificial lake formed in Lippa village under Pooh division of Kinnaur district in Himachal Pradesh has not been breached fully. The lake was formed after flashflood in Pajer nullah in Sutlej river basin on Sept 4, 2025 which blocked the flow of Kerang stream. Subsequently, first floors of about 5 homes were submerged in the lake water. The deluge also damaged 5 irrigation channels, 2 potable water sources & several apple plants.
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SANDRP 