How to isolated possible flooding in the basement

[Steve Crisp]

Doing my very first flip. Got a new roof scheduled for next month and getting tuck pointing completed now. Had a home inspection last month and the inspector said the foundation is solid and GTG. It rained yesterday and I have no flooding in the upstairs rooms but I have standing water in the basement. Verified that the water is turned off to the house but now I'm wondering if I should spend money to get the basement water proofed. Have any of you guys experienced an issue like this and what did you do to resolve it?