I have a Euonymus planted near my whole home generator. Recently, for the first time since installation, the generator was on for a few hours. The euonmyus is near the exhaust. The plant took a few hours of very dry hot air, which looks to have killed it. It lost its color, and is now dropping all its leaves. Do we think the entire plant is dead, or will new leaves show once the current leaves drop? Prior to this incident, the plant was thriving. Any help would be appreciated!