In his book Earth Emotions: New Words for a New World (2019), Glenn Albrecht elaborated the term ‘solastalgia’. A portmanteau coinage, embracing ‘nostalgia’ (longing for the past) and composed of the Greek term algos (pain) and Latin solacium (solace), solastalgia alludes to the feeling of being homesick while you are at home. If you have never lived in a house threatened by rising waters, think of how, upon arrival at a pleasant destination when travelling, you can be instantly overwhelmed by homesickness for precisely that place, because you know your stay will be of short duration. The medical journal The Lancet has already referenced ‘solastalgia’ as a useful concept to assess the effect of climate change on mental health. (Quoted from an article by Thijs Weststeijn)
Comparable terms in other languages might be: saudade, banzo, dor [Portuguese], hireath, cwtch [Welsh], momo no aware, wabi sabi [Japanese], ma [Chinese], Sehnsucht [German], tizita [Ehtiopian], añoranza [Spanish], morriña [Galician], regrette [French], also from English : melancholia, sadness, grief, blues, longing, absence, pining, yearning…