Reincarnated! But into a dying world

A normal avid reader of online reincarnation novels is going about her day, heading to the local supermarket to buy some vegetables but suddenly, BOOM! She's hit by a truck as she crossed the road. She was only one step away from her beloved snacks, how tragic! However despite her anguish at suddenly dying she had twinkles in her eyes as she realized that, she had reincarnated! 'Yes, finally!' 'Now I can finally become one of those op face smacking MC's!' She thought merrily while opening her eyes to face her new life... 'HUH?! Is this some kind of sick joke?' She yelled out towards the sight she was faced with. Yes. She was indeed reincarnated into a dying world. Where survival was of the up most importance.