Ferrari say team principal Frederic Vasseur will not be at the track for the Austrian Grand Prix as he has had to return home for personal reasons.
Aston Martin will have a new floor and top bodywork for the Emilia-Romagna Grand Prix.
Official F1 weather forecast says: "Rainy then improvement after midday. Cloudy with a moderate chance of scattered showers during the race. Race start at 15:00 local.