I already posted it, but it's better to see here and it continues to spread

acid rain fucking with pH?

Looks like a fungal infection to me. I would remove the infected leaves and dispose of them in the trash to minimize the spread (and wash your hands after). Then I would spray down the affected plant(s) with a fungicide. I usually start with neem oil and see how it responds (if it doesn't respond I would consider trying something else like Captain Jacks Copper Fungicide). Fungal infections can be tough, it may turn into a case of trying to manage the disease (routine spraying especially after rain or heavy dew) if you can't beat it. I would also be careful about cross contamination, clean tools and wash hands between plants to avoid spreading it. Also, spacing uninfected plants away from infected ones can help. Hope this helps.

It seems that the storm was the trigger, this is a mold problem, most likely from botrytis, I am not very experienced being a beginner, but instinctively I would remove the leaves that are rotten or that have mold, be careful not to shake the plant so as not to touch the healthy leaves and not spread the damage, do not throw the leaves in the compost or perhaps in the pot, it could make the situation worse, now improve the air circulation and control the humidity and do a preventive and curative fungicide treatment