Implications of Urban Heat Islands in Dhaka:

The growing UHI phenomenon in Dhaka has several adverse effects on the city and its residents:

• Rising summer temperatures lead to increased energy demand, resulting in power shortages.

• Air quality deteriorates, contributing to greenhouse gas emissions.

• Higher daytime temperatures and reduced nighttime cooling affect public health, leading to discomfort, respiratory issues, heat-related illnesses, and even fatalities, particularly among vulnerable populations.

• Urban heat islands contribute to water pollution and impact water bodies negatively.

Addressing Urban Heat Islands: 

To combat the Urban Heat Island effect and create a more livable urban environment, various measures can be taken:

• Smart Urban Planning: Implementing well-thought-out urban development plans, such as the recently introduced Detailed Area Plan (2022-2035), can help create a more sustainable and cooler city. Introducing green spaces, parks, and preserving waterways can reduce the extent of heat-absorbing surfaces.

• Increasing Greenery: Planting more trees and vegetation plays a crucial role in reducing temperatures through evapotranspiration and providing shade.

• Cool Roofing: Using reflective roofing materials with high solar reflectance can significantly lower roof temperatures and reduce the UHI effect.

In a rapidly growing country like Bangladesh, it's vital for both citizens and policymakers to address the challenges posed by urban heat islands. Initiatives such as heat wave action plans, early warning systems, and public awareness campaigns about heat-related precautions can minimize health risks. Adequate training for healthcare professionals to manage heat-related illnesses is also essential. Establishing cooling centers for vulnerable populations further enhances public safety.

For instance, prominent real estate companies like BTI, Sheltech, SELL, ect. are stepping up to address the UHI issue. They prioritize sustainable construction practices, adhering to building codes and incorporating green spaces. Utilizing heat-reducing materials and adopting eco-friendly features like rainwater harvesting and solar panels contribute to energy conservation.

Tackling the challenges of Urban Heat Islands requires collaborative efforts across all levels, from individual actions to larger policy changes. By working together, we can create a more resilient and cooler urban landscape for everyone to thrive.