FP1 was sopping wet today, with no car managing more than 9 laps of running on inters and extreme wet tyres. Given that this is a sprint weekend with reduce free-practice, and more rain predicted throughout the weekend... there's an elevated chance of shuffling the order.
There were a large number of off-track events, though nothing more than minor damage.
Aquaplaning seemed common on the inters, with off-track events being accompanied by very long stopping distances and extreme understeer.
Verstappen will take a 5-grid place penalty in the Gap this weekend in order to fit new gearbox components that exceed the season allowance.