urban heat Archives - Disasters News

Mar42025 by Editor DeskNo Comments

Unplanned Urbanisation Fuels Rising Heat Managing Blue-Green Spaces Key to Mitigation

Breaking News, Climate Actions, Environment

Urbanisation is coming at the cost of natural blue and green spaces leading to a surge in surface temperatures and exacerbating the Urban Heat Island (UHI) effect. Researchers warn that without sustainable urban planning or urban centres especially in developing nations like India will face hazardous heat stress, threatening both human health and local ecosystems. Urbanisation and Rising Temperatures The C(UN) estimates that by 2050, 68% of the global population will live in urban areas, with 90% of this growth concentrated in Asia and Africa. As a result, the rate of urban land expansion is already twice as fast as population growth, leading to a dramatic transformation of landscapes. Studies project that by the end of the 21st century, the Land Surface Temperature (LST) could ri...

Jul212024 by Editor DeskNo Comments

Cooling Urban Heat Islands: New Study Highlights the Role of Surrounding Countryside

Breaking News, Climate Actions

Scientists at the University of Surrey's Global Centre for Clean Air Research (GCARE) and Southeast University (China) have discovered that cooling "urban heat islands" may depend significantly on the surrounding rural areas. The study, which analyzed 20 years of data, reveals that rural regions can effectively reduce city temperatures, especially when the rural ring around a city extends for at least half the city's diameter. Urban heat islands, characterized by significantly higher temperatures in city centers compared to their rural surroundings, are a growing concern as global temperatures rise. Traditional approaches to mitigate these effects have focused on integrating green spaces, wetlands, and waterways within urban areas. However, the scarcity of urban land makes these measure...

Jun32024 by Editor DeskNo Comments

UN Report Reveals Alarming Degradation of Global Rangelands, Urges Immediate Action

Breaking News, Climate Actions, Environment

The United Nations (UN) has released a new report highlighting the alarming degradation of rangelands worldwide. Covering more than half of Earth's land surface, rangelands are crucial ecosystems that sustain billions of people by providing meat, dairy, fiber, and other staple foods. However, the report finds that up to 50 percent of these vital landscapes are now degraded, with previous assessments underestimating the extent of the problem. Poor land management practices, exacerbated by climate change, are identified as the primary drivers of rangeland degradation. These practices include land clearing, mining, overgrazing, soil nutrient depletion, erosion, and wildfires. Conflict and border issues in some regions further contribute to overgrazing, hindering livestock movement and exac...

May22024 by Editor DeskNo Comments

Rising Temperatures in India’s Metro Cities Understanding the Urban Heat Island Effect

Breaking News, Climate Actions, Environment

As the calendar flips to May, India's major metropolitan cities are experiencing a surge in temperatures, with Delhi, Mumbai, Chennai, and Bengaluru all recording high mercury levels. The phenomenon is not merely a seasonal shift but is closely linked to the urban heat island effect, significantly impacting urban environments. The urban heat island effect describes a situation where urban areas exhibit higher temperatures compared to their rural surroundings. This disparity arises primarily due to human activities and the infrastructure in cities, which absorb and retain heat more efficiently than natural landscapes. Causes and Effects Urban areas, with their abundance of concrete and asphalt, absorb heat during the day and release it slowly, leading to elevated temperatures, pa...