Why do Curie and Citra decide to leave Falling Water in the novel, Thunderhead (Arc of a Scythe)?

Attackers plan to kill Citra and Curie by planting explosives around Falling Water. Greyson Tolliver collides with Curie’s car as the two scythes are on their way home to prevent them from getting caught in the explosion. After this encounter, Curie and Citra decide to leave their home and live nomadically until the threat is resolved.