These things happen in the Med now and then.. as for the temps.. its a body of trapped water
more or less.. it also happens..
I remember being in a 'Hurricane' event in Mallorca back in 96.. boats were dumped on roads and one sailboat ended up 40ft up a cliff just round the corner from Andratx.. I was on the hook in the inner harbour behind the breakwater where we had run for shelter when the anchorage became untenable.
Did a lot of damage in Palma as well.. and 1 death from a palm tree blowing over.
Unforecast and out of a clear blue sky.