Method and apparatus are disclosed for vehicle flood detection. An example vehicle includes an engine, a humidity sensor, a GPS receiver to determine a vehicle location, a communication module, and a control module. The control module is to collect, via the humidity sensor, a humidity measurement within the engine and collect a humidity level of the vehicle location. The control module also is to identify a flooding event when the humidity measurement exceeds the humidity level by a predetermined threshold and record the flooding event with a remote server via the communication module.