This is the 4727th most frequent Portuguese word.
elevadas
"Elevadas" means "elevated" or "high" in English.
In this sentence, 'elevadas' is used as an adjective describing 'temperaturas', indicating that the temperatures are particularly high.
As temperaturas estão muito elevadas nesta região durante o verão.
Temperatures are very high in this region during summer.
Here, 'elevadas' refers metaphorically to 'ideias', implying that his concepts or thoughts about technology are ambitious or grand.
Ele tem ideias muito elevadas sobre o futuro da tecnologia.
He has very lofty ideas about the future of technology.
'Elevadas' in this case describes 'estruturas', meaning they are tall or situated at a high level, affecting the visibility from the building.