Maybe she could shift the boats around so the bridge is a bit less precarious? Or weld the bridge and get rid of the dangerously slick ice?

Or some other way to get people and stuff off the boats that are still in the bay and over the expanding sheet of ice onto this place which no longer really qualifies as a beach.

Well. How many people are on the boats that are already here? How far away from shore are they?

A few dozen. They seem to be about half a mile out, not making any more progress through the thickening ice.

Alright. First things first. She heads out to them.

The bridging doesn't reach all the way out to the other boats - they're stuck in the ice a fair distance out from the collection closer to shore.

Well. She has rather wanted to try out the water, even as it had not really been the time. This seems like the time!

She dives into the water.

Predictably, it burns. A lot.

It's very exciting!

She can use magic to swim better (and has work to do, so she does that and doesn't go for getting distracted) and shortly is pulling herself out onto the ice. Magic can cover up the fact that, well, she just dived into something that burns her.

Hello to the stuck people! She's a helpful visitor who's been helping their friends on shore. Would they like a teleport over there?

Teleporting sounds fake, and dangerous if not fake. The shore looks awfully warm though...

 Also, going out on the ice like that is pretty dangerous! Is she OK?

Teleporting is not fake, she can do some non-teleporting magic for them first if they want to see. And not dangerous; she teleported a bunch of people over to the Generator and they're all fine. 

She's totally fine! It's very hard to make her meaningfully not fine. Because magic.

Still sounds fake.

Moving the boats inland or making an ice-bridge would be nice. If it's not fake.

She can do that, but it'll be somewhat more of an undertaking and it's getting late and all that. If she moves say one boat, would that convince them to try teleporting? Is there anything else that might convince them, like if she goes back and teleports over someone from shore, or shows them how the advance party is at the Generator?

Why doesn't she just come back tomorrow or something? Nobody's in immediate danger or anything. They're all tired and stressed out and scared and have no patience for new hard-to-evaluate things right now and just want to sleep!

She can do that if they prefer.

Would they like some warmth? She can make warmth. They can feel it so they'll know it's not fake.

Warmth would be nice.

Anything in particular they'd like to be made a source of warmth?

...The rooms where they've been sleeping?

She can do that! What are the rooms like?

Cabins with bunk beds, plus storage, hallways, or machinery spaces that have had a lot of bedrolls laid out on them.

If she was doing this like she did the warmth area (or if she was a different mage and not herself) it would take longer, but this doesn't need to last as long, and she is herself. She stands in or near the relevant places. And she can make the signs carve themselves and she can set (short term) warmth down.

The fact that it requires weird signs makes them nervous again! That word 'witchcraft' comes back.

Does it help at all when the warmth starts happening?

They're still nervous. But they don't have the energy or impetus to do anything about it.

Well hopefully nervousness but then warmth for the night is going to be better than not that.

Warmth, warmth. 

They don't want anything else, right?

They want to get off the boats and go to the city. But it's a bad idea to try and do that in the dark, so they just want to sleep.