Episodes airing on Australian screens this week feature a devastating car crash and a dangerous hostage situation involving the Braxtons.
Show bosses have previously teased that one character will not make it through the week, although it is currently unclear whether the death will come from the crash or hostage drama.
Addario, discussing the fallout from the two incidents, told TV Week: "The whole town is dealing with the aftermath and shock of the past week's events - there is an avalanche of emotions. Many residents are dealing with grief, shock and anger.
"It will take a long time to heal, and families and friendships will definitely be fractured. The consequences are ongoing."
Watch the official promo for event week below:
Firm details of both stories are still being kept under wraps until transmission. However, it has been confirmed that Ruby Buckton's actions will be one focus of discussion in the Bay when it is revealed that she tampered with the car that crashed.
Viewers will also see the local residents gathering for a funeral following the mystery death.
Of the funeral, Addario added: "People are still coming to terms with what's happened. For many people a funeral means closure, but in this case the grief could tear relationships apart rather than bringing them closer together. This could be the ultimate test to unite or divide a family."
Home and Away airs the funeral scenes next week on Network Seven in Australia, and in October on Channel 5 in the UK.