rain rain rain

If a half inch of rain falls on Philadelphia, guess how much rain that is?

The city of Philadelphia is 135 square miles.

135 square miles * 0.5 inches = 1.17 billion gallons

The population of Philadelphia is about 1.5 million.

So that's 782 gallons per person....

a gallon weighs about 3.78 kg or 8.345 pounds

so about 6500 pounds, or a little over 3 TONS of rain per person.