“… 1 , 2 Previous studies showed extreme temperatures (i.e., out of comfort), especially heat, to increase the incidence of negative health outcomes such as morbidity 3 and mortality. 4 , 5 Additionally, studies exposed extreme temperatures to be deleterious also for a large array of other health related outcomes, affecting expressed sentiment, 6 , 7 , 8 externalizing behavior, 9 , 10 , 11 , 12 cognitive performance of students and office workers, 13 , 14 , 15 , 16 , 17 , 18 , 19 learning, 20 , 21 time allocation, 22 absenteeism, 23 , 24 hate speech, 25 decision making, 26 and manual labor productivity. 23 , 27 In this article, we leverage information on parliamentary speeches to focus on one of these outcomes: language complexity (which could serve as a potential proxy for cognitive performance).…”