I just looked up the car crashes and it was 3 people to hospital as a direct result of the traffic, I got casualties mixed up with deaths. I'll edit my comment to say.
There's no exact figure on ambulances delayed, but given all the traffic it caused, but for heart attacks (all I could find good data on) the chances of surviving are halved in a 4 minute period (https://www.ahajournals.org/doi/10.1161/JAHA.120.017048), so factoring in all serious injuries there's a decent chance that at least one outcome was severely affected if not changed to death as a result of an ambulance being delayed.
That article seems very new-world-centric
Europe, Mainland Asia & Africa all have native small cats and so the birds and small mammals have evolved to deal with them, the issue is that in Australia & the Americas they haven't and so that's where all the risk of species actually being wiped out is - in the old world the cats largely just replace the larger predators that humans have killed off in the ecosystem