How do I know if my plant is heat stressed?

Common signs of heat stress in plants include leaves with crispy, brown scorched edges, leaf drop, cessation of bloom, bolting, wilting, and rolled leaves. These are all common, natural ways that plants protect themselves from the heat. If extreme heat lasts only a day or two, most plants can effectively protect themselves and return to a healthy state as average temperatures lower. However, if the heat lasts for an extended amount of time or is extreme, the plant has a harder time protecting itself, and may need some help bouncing back.