Weather disasters and other natural occurrences are also sources of mortality. The West Indian manatee and Dugong face risks from hurricanes and cyclones, which are predicted to increase in the future. These storms may also damage seagrass populations. Exposure to brevetoxin from "Karenia brevis" during a red tide event are also sources of mortality; they may be able to be exposed to brevetoxin after a red tide has subsided, as it could settle on seagrasses. African manatees can become stranded during the dry season when rivers and lakes become too small or dry up completely.