Potential impacts of climate change on the transmission of Lyme disease include: 1) changes in the geographic distribution of the disease due to the increase in favorable
habitat for ticks to survive off their hosts; 85 2) a lengthened transmission season due to earlier onset of higher
temperatures in the spring and later onset of cold and frost; 3) higher tick densities leading to greater risk in areas where the disease is currently observed, due to milder winters and potentially larger rodent host populations; and 4) changes in human behaviors, including increased time outdoors, which may increase the risk of exposure to infected ticks.
Though observational data is limited on the links between climate change and dengue risk in Hawaii, future climate scenarios predict warmer
temperatures and wetter summers in Hawaii over the next 25 year, which will cause an expansion of mosquito
habitat and
potential dengue risk areas.