Indian children wade through an inundated road to reach school in New Delhi on September 10, 2009. Over 13 mm of rains overnight, with drizzle continuing, caused traffic chaos on water logged roads and choked sewers in many places in and around the capital city. AFP PHOTO/Manan VATSYAYANA (Photo credit should read MANAN VATSYAYANA/AFP/Getty Images)
13 mm is 1/2 inch. That is not so much, is it?