It's a mystery I hope gets solved soon. Because if our drought gets worse, the last thing I'll need happening is large amounts of water being lost.
Yep, I hear you! I live in Israel, where the climate is very similar to parts of California. We had a bit of a cushion from warming temperatures for a while due to the Mediterranean having its own micro-climate. But in the past few years, the temperatures have really shot up, and no end in sight. It used to be that you'd need a sweater to be outdoors at night, even in summer. Not anymore. The long-term prediction is drought and increasing desertification, something that has already started impacting the whole region.
Some years ago, we had a mid-winter dust-storm that deposited a crazy amount of sediment all over everything. The wind blew from the east for over a month, and in all that time we didn't see the sky. But that spring, the garden bloomed like never before. I wondered what on earth was in that dust.
I realized only later that all that sediment was the topsoil blown right off the drought-stricken farms in Syria and Iraq. The Syrian civil war started not long after, as farmers flocked to the city to escape the consequences of the drought. Since then, it's only gotten worse.
I keep thinking that building our little water gardens is one step we can take to provide habitats that are vanishing in so many places. A drop in the proverbial bucket, but still something!