Climate change creates conditions that enable earlier seasonal activity and general northern expansion of ticks , increasing human exposure to tick-borne diseases in North America . Lyme disease incidence and geographic extent has already increased in Canada and the USA , which has been associated with climate change , including warmer temperatures . Climate change is projected to increase disease spread into new geographic regions, lengthen the season of disease transmission and increase tick-borne disease risk in North America across emissions scenarios throughout this century , with regional variability . Chagas disease is transmitted by triatomines, and most of the Mexican population  already reside in areas with at least one infected vector species in both rural and urban populations . Chagas has already extended its range into the southern USA, and the triatomines' niche is projected to expand northward this century  in both rural and urban areas .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report