KV6 Water in Engine - Help!

Was out myself yesterday in horrible crappy wet weather and drove through a lot of standing water where drains couldn't cope manhole covers were lifting with the force of the water and allsorts,got home thinking "got away with that"jumped in the car today starts the car and hey ho mil light is on thinking something has got a bit too damp fingers crossed it goes back out after a cycle of driving about guess I am lucky I never locked the engine up like yourself