Can urban reforestation significantly mitigate the urban heat island effect in large cities?

As global temperatures rise and urban areas continue to expand, cities are increasingly experiencing the urban heat island (UHI) effect, where urbanized regions endure significantly warmer temperatures than their rural surroundings. Urban reforestation has been proposed as a potential strategy to counteract UHI by increasing vegetation cover and reducing surface temperatures. This approach involves planting trees and greenery in urban environments to cool the air, provide shade, and absorb carbon dioxide. Can implementing large-scale urban reforestation projects in cities like New York, Tokyo, or Lagos substantially reduce the UHI effect, and if so, what are the key challenges and considerations involved in such projects?