Disagree. (Long comment alert!)
Microwaves are electromagnetic rays, just like visible light and x-rays to name a few. Radiowaves have the longest wavelength, from a kilometer down to about one millimeter. Microwaves are the second longest, wavelength usually meassured in MICROmeters, which is why microwaves are called mivrowaves. After microwaves come, in order of shrinking wavelength, infrared, visible light, ultraviolet, x-ray and finally gamma radiation.
Just like the infrared rays from the Sun heat our skin, microwaves cause the object they hit to heat. However, they are not ionizing, meaning they do not mutate your DNA and cause cancer. Electromagnetic rays of shorter wavelength, between gamma rays and ultraviolet, ARE ionizing, but not visible light and upwards.
Chernobyl did on explotion release a a burst of gamma radiation that caused 28 people to die within a few weeks. However, the radioacrive fallout does not release electromagnetic rays, but rather atoms or atom parts. These atom parts are ionizing.
To conclude, microwaves are electromagnetic, non-ionizing rays, while fallout from Chernobyl is ionizing atom parts.