Why are my leaves like this?

Judging by the water droplets everywhere, and the wet tiles, I'd say it just rained or you gave them water yourself. So if its something that just happened today after they got water, then it's likely overwatering. Pots look like plastic, so I'd consider drilling some holes in them on the side. And the bottom if there's no drainage at all.. - Also, cover them up if it starts raining again, or they'll end up dying as the roots can't breathe and they won't be able to absorb nutrients from the soil.