Heavy rainfall or violent wave activity can cause "floods", since if a particular area that is affected by these weather conditions lacks the drainage resources necessary to reduce the water build up then it has nowhere to go.
By the addition of spanish territories
The London-Smog occurs mostly in winter and is a mix of gaseous and solid aerosoles as well as natural fog. The Los-Angeles smog is dry, and formed mostly during sunny and hot weather conditions.
They moved into Alaska during an Ice Age when there was ice from Eastern Asia and they walked to Alaska
