Re: HELP! Yellowing, brown spots and droopy leaves. What disease?
Soaked ground and flooding for several days can cause root damage and leaching away plant nutrients. Lack of potassium & phosphorus would cause the leaves to yellow from the margin inward. ... High nitrogen fertilizer can damage the roots too. Deceasing the plants ability to take up nutrients. Nitrogen overload caused the leaf too yellow from the inside/center outward. Nitrogen overload doesn't appear to be the case. But I think high nitrogen could have burned & damaged the roots reducing nutrient uptake before a nitrogen overload may show.
The smaller banana plant in your picture seems to show curled edges. Blowing up the picture there appears to be slight fading or yellowing of those edges too.
From your above post, you indicated there was 'ton of water' & storms. Try to get the area dried out and apply a small amount of slow release fertilizer to help the roots regrow.
This is just my take on what I see in the photo.