How is a heat wave for garnishment?

Any kind of the air inhomogeneitis will induce light distortions. This explains optical effects observed near the heating surface when the heat transfer is not very uniform, for example in the desert near the sand surface. read more

A heat wave is a prolonged period of excessively hot weather, which may be accompanied by high humidity. There is no universal definition of a heat wave;[1] the term is relative to the usual weather in the area. read more

If by "heat waves", you mean, as used to be common, "infrared rays", then the latter are just a special case of electromagnetic radiation, visible light being another case. Infrared light got dubbed "heat waves" because as light, they are waves, and they cannot be seen, but the heat they produce is easily measured and felt. read more