I wrote this mainly for a school assignment based off of a prompt so there's not much context to "the event" mentioned in the story. So I thought i'd give some much needed context.
After a meteor crashed into the center of Sydney, it completely exploded the building it landed on. That debris hit other buildings and knocked them down and so forth until the entire city collapsed. Only 3 people remain in the city itself. They are;
Curtis Tirrell, he/him
Lena Hilton, she/they
Sage Casale, they/them
This is their story, in their city.