Caritas is a charity based around the globe, which inspired by the Catholic faith reaches out to the poor, vulnerable and excluded, regardless of race or religion. Families with links to the Ukraine crisis may find this site helpful. There is country specific information and contact details as well as social media accounts (e.g. https://www.facebook.com/CaritasPL/) that you could also follow/share on your own accounts if appropriate. They have real time updates and information on support at the border and arrangement of donations.
Caritas is the largest charity organisation in Poland. It consists of 44 diocesan Caritas organisations, which act at the regional level, and Caritas Poland, which is responsible for national campaigns and providing international aid, supporting, in particular, victims of natural disasters and armed conflicts around the world.