Environment, in which the 2nd time step depends on uncertainty its called Stochastic Environment.
This environment involves randomness or probabilistic elements. The outcomes are not entirely predictable and may vary even if the initial conditions are the same.
In the hurricane evacuation model, certain patches of the road was getting damaged after the hurricane in the later timesteps. But which patches are going to witness damage, it was not certain. Thus it can be regarded as Stochastic Environment.