There is an update due for 2pm later today on what they might do to progress. It seems the track and the F1 paddock is ok but F2 paddock is like a swimming pool.
Many fan areas and camping are completely flooded by the sheer rainfall and river that runs alongside the track. The weather is set to improve tomorrow but still have light rain on Friday and Saturday.
I'd say it's not yet clear if the race will go ahead, I suspect F1 will but some of the support races might not. But Italy and the local region might say nope, time will tell.
Meeting underway to discuss if the race will go ahead.
Major roads near the circuit that would bring fans in - gulp