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Areas selected for smart city development are ‘heat islands’: Study

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Areas selected for smart city development are ‘heat islands’: Study

[vc_row][vc_column][vc_column_text]~By Dinesh C Sharma

Study covered 89 of 100 areas selected for smart city projects, says temperature could be 1 to 6 degrees higher than surrounding areas in these heat islands

New Delhi: The phenomenon of urban heat islands, in which concrete and built areas in cities experience higher temperatures than surrounding rural areas, may get accentuated with rapid urbanisation. This is the conclusion of a new study of urban areas selected for development of smart cities.

The study, which covered 89 of 100 areas selected for development of smart cities, has found that agriculture and irrigation are two dominant drivers of urban heat islands or UHI in India. In addition, significant presence of atmospheric aerosols – mainly pollutants – over urban areas can influence UHI.

Moisture from irrigation canals and agriculture fields plays a key role in keeping rural areas surrounding cities much cooler than urban areas, resulting in cities becoming heat islands. In a heat island, temperature could be 1 to 6 degrees higher than surrounding areas. Remote sensing data and climate modelling were used to evaluate UHI all over the country.

When the surrounding non-urban areas have no agriculture during summer, cities are actually relatively cooler during daytime. However, if the non-urban areas are under irrigated agriculture, cities are warmer than surroundings. This means UHI effect during day time is mainly driven by agriculture and irrigation. However, in the night-time, cities are significantly warmer than surroundings in both winter and summer seasons. Night-time urban heat is mainly driven by the amount of heat stored in buildings and other impervious surfaces.

Urban areas located in highly irrigated regions – Indo-Gangetic Plain and north-west India (Haryana and Punjab) – show UHI intensity of 3 to 5 degrees. During summer season (April and May), when air temperature is at the peak, land surface temperature becomes is higher than that of the post-monsoon season in absence of agricultural operations. Moreover, amount of moisture and vegetation in non-urban areas are also limited as crops are largely harvested by the end of March and soil moisture is depleted due to high atmospheric water demands, the study said.

“While urban areas have experienced increased number of heat waves and temperature extremes in recent past, urban heat island effect driven by rapid urbanization can further worsen extreme hot conditions in cities,” pointed out Dr Vimal Mishra, a scientist at the Water and Climate Lab of Indian Institute of Technology, Gandhinagar, which did the study. The results of the study appeared in the journal Scientific Reports.

The development of smart cities will result in rapid growth in urban infrastructure and population, leading to increases in UHI intensity. “Our results can provide policy insights for development of smart cities,” Mishra said. “Considering night-time heating which could be significant during heat waves, measures such as passive cooling should be used. Building materials that absorb less heat and are sustainable can reduce the amount of heating caused by stored heat.” The presence of water bodies and vegetation in cities can also help reduce additional night-time heating in urban heat islands.

The study team included Rahul Kumar and Vimal Mishra (IIT Gandhinagar); Jonathan Buzan and Matthew Huber (Purdue University, USA); Rohini Kumar (UFZ-Helmholtz Centre for Environmental Research, Leipzig, Germany ); and Drew Shindel (Duke University, USA).

(The article is from a syndicated feed provided by the India Science Wire)[/vc_column_text][/vc_column][/vc_row]

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Lashkar terrorist killed in Shopian encounter after days-long search operation

A suspected Lashkar-e-Taiba terrorist was killed during a joint operation by security forces in Shopian after an intensive search lasting several days. Authorities recovered weapons and are verifying the militant’s identity.

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Lashkar terrorist

A suspected Lashkar-e-Taiba (LeT) terrorist was killed in an encounter with security forces in Jammu and Kashmir’s Shopian district, bringing an end to a multi-day search operation that had been underway since the militants were first spotted in the area.

According to officials, the body of the suspected terrorist was recovered from the Saidpora area of South Kashmir. Arms and ammunition were also seized from the encounter site following the operation.

The operation began after surveillance cameras reportedly captured two suspected terrorists moving through a dense orchard in the Chhanapora area of Saidpora several days ago. Based on the footage and subsequent intelligence inputs, security forces launched a cordon and search operation to track down the suspects.

Officials said the search was initiated following information about the presence of suspected Lashkar commander Zakir Ganai and his associate, Latief Bhat. Security agencies are still working to formally establish the identity of the militant killed in the encounter.

Joint operation by police, Army and CRPF

The anti-terror operation was carried out jointly by the Jammu and Kashmir Police, the Army’s Rashtriya Rifles and the Central Reserve Police Force (CRPF).

As security personnel closed in on the suspected militants, an exchange of fire reportedly took place. To prevent any escape, forces sealed all possible exit routes through the orchard. The Army’s specialised counter-insurgency formation, Victor Force, also illuminated the area during the night to improve visibility and tighten the security cordon.

Following the operation, the Jammu and Kashmir Police shared a message on social media stating, “You can run, but you cannot hide,” confirming the success of the mission.

Authorities have not yet announced whether the second suspected militant has been apprehended or remains at large. Search operations in the area are expected to continue.

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Delhi records wettest day of the year as IMD predicts more rain over next five days

Heavy rainfall lashed Delhi-NCR, causing waterlogging and traffic jams. The IMD has issued a yellow alert and forecast more rain, thunderstorms and gusty winds over the next five days.

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Delhi-NCR experienced heavy rainfall on Wednesday morning as monsoon activity remained active across the region, prompting the India Meteorological Department (IMD) to continue a yellow alert for the national capital. The weather department has forecast more rain, thunderstorms, lightning and gusty winds over the next five days.

According to the IMD, Delhi is expected to witness generally cloudy skies on Wednesday and Thursday, along with intermittent spells of light rain, isolated moderate showers, thunderstorms and lightning. The department said wet weather conditions are likely to continue over the coming days, although rainfall intensity may vary.

Heavy showers bring relief but disrupt normal life

Tuesday turned out to be Delhi’s wettest day of the year so far, with persistent rainfall providing relief from the recent spell of hot and humid weather. However, the heavy showers also led to widespread waterlogging, uprooted trees and major traffic congestion across several parts of the city.

The rainfall caused temperatures to drop sharply, with the mercury falling by nearly 10 degrees Celsius compared to previous days.

Traffic movement remained slow on several key roads, including Geeta Colony Road towards Noida, NH-48, Old Rohtak Road and the Akshardham Road stretch leading to Noida.

Weather system behind the rainfall

According to weather experts, the ongoing rainfall over Delhi was triggered by the interaction of a western disturbance over northern Pakistan, an intense low-pressure area over central Madhya Pradesh and moisture-laden monsoon winds arriving from the Arabian Sea.

Meteorologists expect rainfall intensity to reduce gradually over the next two days, although isolated spells of rain are likely to continue while temperatures rise slightly.

Schools shut in parts of Karnataka

Amid continuous rainfall in Karnataka’s Belagavi district, the district administration declared a holiday for anganwadis, schools and colleges in Belagavi, Khanapur and Nippani taluks due to widespread rain.

PMO reviews El Niño preparedness

Separately, the Prime Minister’s Office held a high-level review meeting to assess the progress of the monsoon season and the possible impact of El Niño. Principal Secretary to the Prime Minister Dr P. K. Mishra directed ministries and states to closely monitor vulnerable districts, ensure adequate drinking water availability, maintain fodder supplies and keep reservoir levels under regular review.

Officials also noted that India’s rainfall deficit has narrowed to 12 per cent, with the first week of July witnessing above-normal monsoon activity.

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Nitin Gadkari to review Delhi-Mumbai Expressway after fatal Dausa accident

Union Minister Nitin Gadkari is inspecting the Delhi-Mumbai Expressway to review safety measures and construction work following the fatal July 1 accident in Rajasthan’s Dausa district.

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Nitin Gadkari

The Centre has stepped up its focus on road safety along the Delhi-Mumbai Expressway as Union Road Transport and Highways Minister Nitin Gadkari undertakes a road inspection of the corridor just days after a fatal accident in Rajasthan’s Dausa district left eight people dead and 28 others injured.

According to officials of the National Highways Authority of India (NHAI), the minister is travelling by road from Delhi towards Kota and Ratlam via the Delhi-Mumbai Expressway. During the journey, he is expected to inspect various stretches of the highway and review ongoing infrastructure projects.

Inspection to cover safety, maintenance and construction

Officials said Gadkari is likely to pass through Dausa at around 2 pm and may visit the location where the July 1 accident occurred.

The inspection is expected to include a review of road maintenance, safety infrastructure, ongoing construction work and facilities at the Dara Tunnel in the Mukundara Hills near Kota. The visit will also cover sections of the expressway located in Madhya Pradesh and Gujarat.

Preparations have been intensified ahead of the minister’s visit, with NHAI and other departments reviewing safety arrangements and facilities along the route.

After crossing Dausa, Gadkari is scheduled to reach the Mukundra Tunnel project near Kota around 5:30 pm, where he will assess construction progress and hold a review meeting with officials.

Deadly July 1 accident renewed focus on highway safety

The minister’s visit comes after a devastating accident on July 1 involving a bus travelling from Haridwar to Indore.

The bus reportedly collided with the rear of a trailer truck near Dhanawda village at Zero Point under Kolwa Police Station in Rajasthan’s Dausa district before plunging into a roadside gorge and catching fire. Eight people lost their lives while 28 others sustained serious injuries.

Data from authorities shows that the Dausa stretch of the Delhi-Mumbai Expressway has witnessed a significant number of fatal accidents. In 2025, 33 road accidents claimed 35 lives, while 24 accidents recorded till the end of June 2026 resulted in 26 deaths.

Preliminary findings point to signage issues

Initial findings indicate that inadequate road signage may have contributed to the July 1 crash.

Officials believe the trailer truck involved in the accident was supposed to exit towards the Jaipur-Ajmer route but missed the turn at Zero Point because the exit was not clearly marked. After slowing down, it was struck from behind by the bus.

Sources familiar with the matter said drivers approaching from Delhi frequently face confusion while taking the Jaipur 4C Link Expressway due to the absence of clear directional arrows or signboards at Zero Point. Although signboards are placed around two kilometres before the exit, the arrows are reportedly too small to be easily noticed at highway speeds.

Authorities have also identified similar concerns at other locations on the expressway, including insufficient directional guidance for motorists travelling towards Jaipur via Dausa or Kanota.

Committee examining safety shortcomings

Following the accident, the Dausa district administration constituted an inquiry committee to examine safety issues along the affected stretch of the expressway.

On the directions of District Collector Soumya Jha, the District Road Safety Task Force conducted a review of road safety measures.

Committee member Vishnu Sharma said an eight-member inquiry panel headed by the Additional District Collector will inspect Packages 6, 7 and 8 between chainage 150 km and 240 km on July 8 and 9.

The preliminary inspection reportedly found several shortcomings, including non-functional SOS phones, unclear direction signs, and deficiencies in monitoring speeding vehicles and enforcing speed limits. The committee also observed that inadequate signboards at Zero Point could be increasing the risk of accidents.

Meanwhile, temporary encroachments along the expressway between Alwar and Dausa have been removed as part of safety measures. Officials have said the exact cause of the July 1 accident will be determined after the investigation is completed.

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