Something rapidly killing off tomato plants

Hi there, I’m having a sudden and quickly spreading issue with my tomato plants this past week or so that I haven’t been able to identify (and respond to). I grow tomatoes in pots and in a layered raised bed.…

Tomato plant

About six stands out of the over 1000 stands of tomatoes were discovered to show some signs of leaf curling as shown in the picture. Please what could be responsible for this condition and how can it be cured or…