Right about here, where William Hovell Dr passes under Caswell Dr, a large pothole has opened in the lane turning to head south on the Parkway. After passing this pothole (and narrowly missing it, even though the traffic was very slow), I then counted no less then six cars stopped with flat tires.
I would recommend everyone keep an eye on the road surface, as in this rain huge holes can open quickly. I would also recommend paying attention to the handling of your vehicle, as at least one car had a pretty shredded tire, and had gone some distance with it flat.
None of the people appeared happy to be standing/changing a tire in the rain.