They'll presumable be a 2 minute silence and a black arm bands, but I agree it doesn't feel enough for the fans. The players will surely have their own private ceremony for some closure.
Tyres can wear out in a supercar after 6000-12000 miles depending on the driving style and power going through them. Normal cars are between 25000 and 50000. These cars are going to go between 2-4x more tyres over their lifetime and I guess one or two missed services and you're in a danger zone. Presumable the car is registered in Spain/Portugal and MOTs are every 2 years in both, meaning these high performance cars could get pretty risky within that time frame, especially around a windy mountain road. Heat may have been a factor given the heatwave around Europe, but at 12/1AM I would have thought the road would have cooled down.