In early spring, blackflies may be a temporary annoyance. It can be troublesome in still and moist weather. Check for and remove any ticks promptly. Take shelter under cliffs if possible. Do not stand under isolated or very tall trees, or on ridges or mountaintops, where lightening frequently strikes.
Most sudden downpours are over quickly and pose no danger other than getting soaked.
If, however, you anticipate fording a mountain river such as the Chattooga or Cooper Creek, keep your eye on water levels. Streams can rise suddenly and cut you off, or force you to swim across and be subject to possible hypothermia. Don't leave enticing foods around. If ever confronted, stop and slowly back away. Make lots of noise.