urgent care!!!!

i found a red eared slider outside who, long story short, happened to be my neighbors who he let go because it got “too big.” i felt bad leaving him behind bc i was scared it would die and now i’m stuck taking care of it for the night and i have no clue how and he’s super pissed off. the guy who previously owned him had a shitty excuse for abandoning him and i can’t just let him off by himself. how do i take care of a turtle just for the night??? all the shelters are closed already and no place will take him :(