I don't recommend Miracle grow, just because I hate Monsanto.
Fox farm ocean forest is packed with nitrogen, the food wasn't necessary in my opinion. That combined with the heat spike will make that kind of damage. I wouldn't use nutrients for a while.
Keep an eye on the plants, they may need a flush to get the miracle grow out. An experienced soil grower could give you better guidance than I can.
Leaves don't repair but there are plenty of new leaves to come. Good luck with everything, I will check back tomorrow.
Toking and crashing. Good luck with everything and have a good night.