Taking this step may improve the quality of life for vulnerable people and reduce the amount of air conditioning they use, making their neighborhoods less prone to power outages.
July is the hottest month in much of North America. Experts explain who is most affected by heat waves and ways to cope with them.
Dense, high buildings limit the space available for urban greenery. But imaginative projects that involve the community can ensure nature and the city go hand in hand.
Research shows if Australia encourages greenery on buildings, it will reduce temperatures in the city, as well as potential for flash flooding. It also creates new habitats and socialising spaces.
Urban bees deal with what's known as "habitat patches," discontinuous patches of green like gardens, parks and ravines. Green roofs could offer relief to bees dealing with habitat fragmentation.