Purple could mean many things but if it's talking about climate and such then cooler colors like purple are usually meaning colder climate
This is due to sahara desert and cold water current flowing on it
Rip currents are mainly caused when the sea is rough and large waves break into the shore. the water from the previous large wave tries to find a weak spot in the incoming wave and when it finds it, the water quickly pulls away from the shore causing dangerous rip currents. This type of currents have caused numerous deaths.
1 on the top one on the bottom
