Sonnie comes through the fog alert, working on a counter, she feels the Clause catch, the glamour feeding into her Elemental Cloak, only...nothing changes within the Dream. Like an itch in the back of her awareness, Sonnie can feel the wind tugging at her clothes and messing with the blankets on the sky bed.
Sera's cold, but her teeth aren't chattering, not like how Vincent's are. For the Hunterhear it looks like frost is clinging to him, his extremities are turning blue, like the cold is gripping him, and not letting go.
In the distance, in the direction the fog and the figures went, they can hear something, distantly now, they almost can't catch it, but it's the unmistakeable sound of someone screaming.
If you want something like Cloak of the Elements, you'd need to roll Wits + Empathy + Wyrd -3 Dream Intensity, but it wont be exactly like the Clause, and remember all previous dream actions can be taken, if you want a more concrete location on whoever's screaming please give a Perception roll!