I see that in far-northern-hemisphere winters the rivers narrow and recede. I imagine it’s because of the freezing of water further up, and the rain turning to snow. In the far north, rivers ‘dry out’ in winter. Here, of course, it’s the summers that bring the thinning—dry earth baking under the southern sun. Here the rivers dry in summer—which is that same time as winter in the far north. Summer here is the far northern winter, and vice versa, with rivers in these places all drying out at the same time on earth. 

But it’s not just the rivers. Extreme heat and extreme cold carry similar challenges. We stay inside in the heat of the day; those in the north in the cold of the night, or the cold of the day. In summer, so much here is dying, dead, hibernating. In the north, that’s the quality of winter. Here, in autumn and (to an extent) winter, then spring, we come out again (though some stay out in summer), when things are greener. Like the way the north comes out in summer. 

Yes, there are polarities and balancing; but also, strangely, we’re often doing the same things at exactly the same time.