Even with all the highly optimized insulation and ventilation that Merrin has managed so far, and the afternoon high juuust starting to drop, and the fact that she's started stripping the tarp off in the middle of the night and leaving the shelter door cracked open and actively trying to get the temperature inside to below freezing by dawn, it's still gotten up to 31° C in her shelter. 

And the noon sun coincided with low tide and an enormous nearby evaporation surface, so the relative humidity outside is nearly 100%. Even with her poor abused repurposed-portable-ventilator unit blasting its maximum air pressure of colder-and-thus-lower-water-content cave air from deeper under the earth, it's still 82% humidity inside. 

28.8° C wet-bulb temperature. Survivable, for now. Pretty good, really, when the outside wet-bulb temperature is still at 47° C and would give an unprotected human heatstroke within minutes, but that does not mean that Merrin is comfortable or in a good mood.

She's overheated. She's down to exactly four meal bars held in reserve in case she gets sick or something and has been supplementing with low-calorie pouches instead. She's hungry and thirsty and incredibly tired of every single possible variation on cooked snail meat and bulbwrack "baked goods". 

She's finishing her routine suit maintenance, and mulling on a plan for her afternoon.

It's kind of a stupid plan, but Kalorm is all for it, even Laeirthe acknowledges the pragmatic expected-value benefit to her future survival prospects, and it would give her an excuse to put on her power armor and leave her stupid hot humid cave for a few hours - while the sun is still up, even - and DO SOMETHING. She's booooooooored. This is by no means the worst threat to her survival but she's sooooooo booooooooored. 

She checks the time. 37:55, which no longer even qualifies as late afternoon these days. Sunset won't be for another thirteen hours. But the tidal bore is due in just a couple more hours, and should bring in some cooler more refreshing air, and then she would have her window for her stupid-but-maybe-worth-it plan... 

Vicar Esta will after recent events be Stunned for several rounds and Discombobulated for some time after that.

...but will eventually recover to the point of trying, more or less on total reflex, to lay a Lesser Restoration on himself.

He can't cast it, and it's not immediately obvious why.

So, uh.  Where is Vicar Esta and what sort of sensory impressions is he getting right now?  If it's relevant, he had an Endure Elements up and a couple of combat-related buffs.

He seems to be at the bottom of a river valley with limestone walls of varying steepness, with a step-like erosion pattern. 

There's still a river in the valley, but it's a small one, with a sluggish current. Certainly the ground under his feet is thoroughly dry, baked and cracked, though the air is too humid to be a desert. 

The river is a very odd shade of deep maroon.  

The sun looks...wrong. The light is a shade too harsh, a little too on the bluish side of white. 

Going by the heat-shimmer, it's very hot, though if he has Endure Elements up then he will not yet be inconvenienced by the temperature of 47.8° C and nearly 100% humidity. The blueish sun, however, despite being very far away and not actually setting the landscape on fire, is also going to be steadily dealing some sort of Fire damage, noticeable within minutes of exposure. 

There's also an entrance to a cave, thataways. 

(Oh, incidentally, despite being at a sea-level pressure this air only has two-thirds as much oxygen as it should. For someone who does not have dath ilani metacognition training, and the easily available hypothesis that atmospheres will vary, this will probably not be directly noticeable until he's attempting some kind of physical exertion.) 

Due to his current state of Discombobulation, Esta is not thinking overwhelmingly clearly.  His current Wisdom, even with the augmentation of his headband, is below the WIS 12 required for him to successfully cast Lesser Restoration on himself.

If Esta had better introspection running, he'd notice that his cognition is generally impaired; but the thing is, it is exactly Wisdom that one would use to introspect on that sort of thing.

Esta feels exposed in these surroundings!  The CAVE looks less exposed.  What happens to him if he tries to stagger in the general direction of the cave?  In particular, what happens when he gets to the river?

The river looks significantly deeper than its width, and is not quiiiite narrow enough at any point to easily jump across. The current is steady and smooth but only medium speed. If he wants to jump and land half-in the water but able to grab the opposite bank - or just to try swimming it - he could probably manage that.

(It's also quite shockingly cold, compared to the ambient air temperature, but with an Endure Elements up, neither temperature extreme is going to stand out as much.)

Even in his current mentally damaged state, Esta does not feel like he wants to just jump in the water like that!

What happens if he looks around for a place where the river widens enough to be shallow or narrows enough to be jumpable?  For a couple of minutes, say.

He can eventually find a spot further up, a bit past the cave, where an enormous boulder wedged deep in the sediment sticks out into the river, forming an overhang that the water mostly flows under. It's stable under his weight, though, and from there it would only be a three-meter jump at a slightly downward angle. 

The sun sure is dealing more Fire damage than a sun has any right to. 

Back at her camp, Merrin checks the time, confirms that the tidal bore is due in the next 30 to 45 minutes, and starts donning her power armor and running through her safety checklists. 

She's still considering that she might bail out on her stupid plan, but she likes watching the wave crash in. 

Hmm.  Fire damage.  From the perspective of anyone not from Cheliax, Esta has spent a surprising amount of time being on fire.  Esta lacks a proper startle reaction to this state of being.  Especially since it's the sort of fire damage you get from being slowly tortured by someone authorized to do that, rather than the sort of fire damage you get in combat as might provoke a more appropriate reaction.

It is weird that nobody is telling him to hold still and accept his punishment.

He'll try to jump the river at the boulder-point.  That seems very wise, really, given his current state of mind.  He definitely wanted to be on the other side of this river at some past point, and if you can't coordinate with your past self then who can you even coordinate with?

How does this wise life-choice work out for him?

He gets a bit wet but this does not cause any unexpected additional damage. 

The cave is no longer actually in sight, but if he remembers which way to turn and keep walking, it'll only take him five minutes or so to backtrack along the side of the river and find the cave again. 

The cave would be good.  Wait, but then he's trying to not be on fire.  Is that bad?

Nobody has told him he's supposed to be on fire.

Well, but usually when somebody sets you on fire, it's sort of implied...

Actually.

What if an unauthorized person has set him on fire?

That would be outrageous.

Esta will stride more quickly for the cave.  He's not really outraged, not in the core of his soul, but the thought has occurred to him that possibly he ought to be outraged as a good Asmodean and that is almost the same thing as having an emotion.

The cave is out of the sun!

It’s pretty slimy. Moving through it without slipping is difficult, especially in the much dimmer lighting before his eyes adjust: A few meters in, there are puddles. It smells of brine and decay.

(The radon gas pooling in the cave today is colorless and odorless and will have no immediately obvious negative effects. The fact that it’s also displacing some of the already-lower oxygen might have noticeable effects for someone with more functional metacognition.)

Hmmm.  Yes.

This looks like an Adventure Cave.

Esta will wait a bit just inside the entrance of this cave to see if anyone brings backup for him, or if... something wears off...

Oh hey he's under some kind of status effect, isn't he.  One with minutes duration, at least.

Esta, using more careful deliberate focus this time, is going to cast Detect Magic to see if he can see what sort of magical effect is affecting him.

He doesn't see any magic on himself that's not supposed to be there.

He does successfully cast the Detect Magic.

Esta tries again with Lesser Restoration.  If there's anything impeding his Wisdom, he'd like it gone or reduced, please.

...WHAT THE ABYSS JUST HAPPENED TO HIM (and to Worldwound Fortress #14) and WHERE THE ABYSS IS HE?

Merrin, at this point, is departing her shelter and heading for the riverbank, equipped with her safety-checklist pouch of emergency supplies in case she manages to injure herself or her armor has a problem and she gets stranded.

Vicar Esta has now pulled from his Bag a Continual Flame skullcap -- not the sort of magical skullcap that might interfere with his headband, just some minor jewelry to light his way -- and is now looking at least the next layer deeper into this pleasant, out-of-the-burning-sun cave.  He does not have a huge number of skill ranks in Survival (Exoplanets) but he knows that pleasant little caves are often inhabited by things powerful enough to take and hold them -- though the victors of caves are not usually 6th-circle Asmodean cleric amounts of scary.

Esta is proceeding carefully nonetheless, but in the sense of looking around for dangerous predators as he goes, not so much in the sense of carrying a radiation detector with him.

Actually, this cave is remarkably clear of anything mobile and larger than a worm!

Some of the tidepools have shelled mollusks very firmly adhered to the bottom. There are tiny creepy-crawlies in the damp rotting piles of debris. One tidepool has segmented armored centipede-worm-fish creatures with very faint blue-green bioluminescence.

Other than that, it's really pretty much limited to slime. 

(And a tidepool holding a woven cage full of giant snails, but that's further in and around two corners.) 

Merrin reaches the top of the riverbank and perches on a pile of rocks. (She only brings her wicker chair and sun-slash-rain-shade out when she's using them, to minimize rate of UV degradation.) 

There's a line of white breaking at the edge of the line of purple, in the distance. Ten minutes, she thinks. She'll know it's due in four to five minutes when she starts hearing the roar and feeling the vibration through her boots. 

(Imaginary Kalorm thinks it's majestic and delightful.) 

Esta has nowhere near the ranks in Survival (Weird Fucking Caves) to deduce where on Golarion he got Teleported to, he isn't a Cave Druid.  He is not going to get remotely far enough from his starting point that he would run the tiniest chance of getting lost while mentally impaired.  He is just checking to make sure that he is not immediately next to a vampire apartment complex or an alghollthu student enrichment center.

Having done that part, he's going to move closer to the cave entrance; and then, on his current plan, he is going to pull a Sending scroll, and start the 10-minute process of calling for help.

He will get about six of those minutes with nothing in particular happening, and then there is going to be a Very Ominous Roar in the distance - the downstream distance - accompanied by a vibration he can feel in his bones through the stone.