So you don't like the IPCC, the largest scientific organization on climate change in the world. Alright, that's fine then. I can cite things that aren't the IPCC:
"Heat waves are now also killing hundreds of Americans each year. Particularly at risk, experts say, are people who live in dense urban neighborhoods that lack trees, open space, reflective rooftops, and other infrastructure that can help dissipate the heat absorbed by asphalt, concrete, and brick. Research has shown that temperatures in such areas can get up to 15°F hotter than in surrounding neighborhoods on summer days. The fact that these so-called “urban heat islands” are inhabited largely by Black and Latino people is now seen as a glaring racial inequity that should be redressed by investing in public-infrastructure projects that would make the neighborhoods cooler and safer."
source: https://magazine.columbia.edu/article/6-things-you-need-know-about-climate-change-now