Weird weather

My recent trip to Greece has focused me this week on two different perspectives on the weather. Once again records are being broken. In UK, in Sheffield for instance, flooding as never seen before from yesterday's sustained and heavy rain. But across Southern Europe e.g. in Volos, near where we were recently the BBC's recording a heat wave - 47 degrees max with 48 degrees tomorrow!! It's cool here now and very difficult to imagine. But what an incredible contrast. Is this instability down to global warming?