Storytelling is very difficult from environment design alone at the beginning because as a player you don’t have much info to work with.
Uhmm well I can try but most likely I am totally wrong, but it might give you some feedback.
I see a bunch of ambulances and open graves, which weirdly made me think that the people were dug up to be saved (were the bags moving? zombies digging up?) But there are no people around. As if they ran off. The coffins are very clean so they were definitely not underground. The body bags are bloody but the carts are clean, where they dug up and staked like vampires? Did the ambulance people do it? where did they go without the cars? I am clueless sorry