Why Your Plants & Grass Are DyingI mean, the obvious answer here is that it's hotter than the sun right now. It's similar to what our bodies feel when we are outside for an extended period of time in the heat. Signs Your Plants Or Grass Are Dealing With Heat StressHeat stress is common when you have high temperatures and low humidity, so right now, your plants are definitely dealing with it. So don't water your plants every day; you'll drown them. Buffalo grass, Bermuda grass, and fescue are all very different and require different types of care.