This Australian Town is so Hot, That 80 Percent of the Residents Live Underground, its Coober Pedy

 https://ancientoriginsmagazine.com/coober-pedy-australian-town-so-hot-80-percent-live-underground

Living underground to avoid direct sunlight makes a lot of sense in a sweltering climate.

https://www.bbc.com/future/article/20230803-the-town-where-people-live-underground

https://www.stuff.co.nz/world/australia/301027311/newsable-the-australian-town-where-people-live-underground

https://earthlymission.com/coober-pedy-australian-town-built-underground-extreme-heat/

https://www.cnet.com/pictures/the-strange-underground-homes-in-the-coober-pedy-desert-australia , https://www.youtube.com/watch?v=uFA-OB-nJ_I

https://www.vietnam.vn/en/con-nguoi-co-the-song-duoi-long-dat-hay-khong/

https://en.wikipedia.org/wiki/Derinkuyu_underground_city

https://www.bbc.com/travel/article/20220810-derinkuyu-turkeys-underground-city-of-20000-people

https://en.wikipedia.org/wiki/Kaymakli_Underground_City

As more places heat up, earth-sheltered-homes will become more popular.

https://medium.com/@texasjedi/embracing-the-cool-depths-escaping-excessive-heat-by-moving-underground-b000f556fd53

Of course some parts of Canada & Alaska get so cold, that its safer to just remain inside.

https://therabbitportal.blogspot.com/search?q=Canada+vs.+Australia

Living in a Train Tunnel for decades

 https://www.youtube.com/watch?v=D4kcJVkAQ_Y , https://eks.tv/mole-people

The Mole_people are nothing to laugh at. As rent & overall living costs keep on going up, some people live underground.

Amazing Home in the Tunnels Beneath New York https://www.youtube.com/watch?v=ZlK3QbPAE-I

https://en.wikipedia.org/wiki/Mole_people#Cities

https://www.thetravel.com/20-secrets-about-the-mole-people-living-in-new-york-citys-tunnels

10 Years After He Lived in a Train Tunnel https://www.youtube.com/watch?v=zHf8UA1QEvo

https://therabbitportal.blogspot.com/search?q=Living+Underground