Fernando Uceta, who has COPD, uses a portable oxygen concentrator to breathe as he sits on the balcony of his home during the summer heatwave, in Barcelona's Raval neighbourhood, Spain, June 27, 2023.

Fernando Uceta, who has COPD, uses a portable oxygen concentrator to breathe as he sits on the balcony of his home during the summer heatwave, in Barcelona's Raval neighbourhood, Spain, June 27, 2023.

© 2023 Nacho Doce/Reuters