- When a total solar eclipse occurs in a cloudy region, clouds suppress light levels so much that you won’t notice any changes in light levels until about 30 seconds before Totality. Like a fast forward sunset, it becomes dark. Light then returns to normal after Totality in only a few seconds https://whenisthenexteclipse.com/what-happens-if-its-a-cloudy-eclipse/#:~:text=The%20saddest%20thing%20about%20a,build%2Dup%20is%20less%20intense. 11 comments space