There ARE solutions to dealing with high temperatures caused by urbanization (that isn't tearing up asphalt, much as I would also like to do that). For example:
Urban/suburban vegetation: any amount of vegetation can aid in lowering the temperature by increasing evapotranspiration rates, especially trees which also provides a canopy, creating shaded areas
Shaded sidewalks/benches: we can't realistically shade the entire sidewalk, both because of scale issues and also sunlight is, in moderation, good for you, but having shaded areas, especially where rest amenities are like benches, can go a long way into making cities/suburbs more accessible in the heat
Shaded parking lots: I haven't seen an example of this irl but I know there's parking lots where the majority of it is shaded using solar panels, which is really just beautifully efficient
Underground paths/walkways: Toronto, for example, has a system of underground tunnels (imaginatively named PATH) which spans about 30 km and connects various office buildings, restaurants, etc. This helps pedestrians avoid the heat AND the cold in the winter, AND rain/inclement weather!
Non-reflective glass: less relevant for suburbs, but non-reflective glass absorbs solar radiation rather than reflecting it towards street level, which helps tremendously in keeping cities with lots of tall glass buildings cool. It does require more cooling within the building to balance it out, though, so it's not a perfect solution
Lots of other solutions like green roofs/walls, designing cities to allow airflow, dedicated vegetated areas/water features within cities (parks), permeable pavements, reflective roofs (as previously mentioned in this post)
The important thing to note is that these solutions are rarely, if ever, universally applicable, but the flip side of that is that at least some of these WILL be applicable no matter where you live, so it's a matter of figuring out which ones work and which don't.
The other important thing to note is that by no means are any of these a replacement for the Big Beverage. No amount of shade will save you from dehydration, it just means that hopefully you take longer to get to that point. The recommended daily intake of water for a person is like... 2 litres. That's a lot of water so you gotta get started. Always Be Hydrating.
