Tia will be caught up with the landslide too. Perez will gone crazy at point that he uses his aura to make a way all the way to the carriage where Tia's in. He said something like "being a swordmaster is useless if Tia is not existing" Gallahan witness how much Perez treasure his daughter. Also, that Angenas head will die which is I think the start of the downfall of Angenas after the Empress brother succeeded in. After that it will be Lorraine's elope scene from the hand of the first prince and his mother's.
The landslide scene is started in chapter 152. You can find the mtl novel at the novel updates, it will direct you to wattpad. The part 2 of the novel is also there though it was posted by another user, so, you can just search it up. I think 15 more chapters before the landslide scene, Tia will first meet Ramona which is the og fl before the landslide scene.
Spoiler please for the next arc. Tell me what happened? Pleaseeeeee