I have a habanero that looks like that.Its tha HEAT!!!I have the same problems.Your supposed to start your veggies early to beat the heat when there young.Larger plants with deeper root can easily handle 100+ but smaller plants will struggle/die.Feel the soil......I bet its hot as hell,mine is.Mulch around the base is good idea-the outdoorsman.Water during peak hot hours.
interesting to know, thxI'd suggest a good hit of potash too mate, they'll pick back up. Also contrary to beliefs, depending on how hot the chillis are, some prefer the stinking hot heat to reach full potential. As long as they are regularly watered and given nutrients they will thrive in it