As we used to teach in survival classes:
1. Shelter ( clothing is your first layer of 'shelter'.
2. Water.
3. Fire. kitchen.
https://activeprp2k24.law.blog/2024/04/06/the-7-apocalyptic-golden-laws-how-to-survive-more-than-3-months-in-case-the-most-horrible-scenario-called-shtf-happens/