Some creature or creatures regularly (sunrise and sunset, summer and winter, lunar phases) or irregularly (solar and lunar eclipses, eschatological events) attack the luminaries or shade their light
For girls and young women it is dangerous to come near water. Water creatures swallow them or drag away; a girl can die or become pregnant from a spirit; she can trigger a flood (rare: other cataclysm). Water spirits can come themselves to a girl who has her periods
Creatures that produce rain and/or thunderstorms are birds or anthropomorphic beings with wings; or (rare) some or all birds are connected with thunder, lightning or rain though Thunder is not a bird
People who live in the underworld, at the sunrise or sunset (often dwarfs) are scorched by the Sun which moves by at a short distance from them. They are red-haired, dark-skinned, etc.