How do you guys move out of the blizzard in time while making sure to keep your guys healed? I'm having a tough time doing that.

I have a mouse button to strafe left and right, but it's still a bit too slow. I'll move, but then my guys die, or I won't move in time.

edit: it's tough for me to notice others health going down quickly. And it's also tough for me to heal a player from my tank, I don't have hotkeys setup to heal a specific player yet.