On a molecular level, the structure of chlorophyll is very similar to heme, which is a part of hemoglobin present in human blood. Heme, which is what makes blood appear bright red once exposed to oxygen, is bound to proteins forming hemoglobin.
Lightning is a bright flash of electricity produced by a thunderstorm. All thunderstorms produce lightning and are very dangerous. If you hear the sound of thunder, then you are in danger from lightning. Lightning kills and injures more people each year than hurricanes or tornadoes; between 75 to 100 people.
After all, an isolated thunderstorm which moves will wet a greater number of people, and even scattered thunderstorms (implied by less than 50% coverage) can be associated with a very high POP when they are moving along. Stationary showers/thunderstorms wet fewer people.