Flood Fatalities: August 2003 Monthly Total: 14 Vehicle Related: 9
| Day | State | County | Gender | Age | Circumstances |
| 14 | AZ | Pinal | M | ? | Resident swept downstream from his property as a wall of water rushed down Bonito Canyon |
| 18 | HI | Maui | M | ? | Adult male rescued male child who was swept downstream, but adult was carried into the ocean where he died in the surf |
| 22 | KY | Franklin | F | ? | House broke apart in flood waters from Stony Creek, mother and son swept away and drowned |
| M | 5-6 | ||||
| 26 | CA | San Bernardino | ? | ? | 2 persons drowned when attempting to drive car across a flooded was and swept away in Twentynine Palms area |
| ? | ? | ||||
| 26 | CA | San Bernardino | ? | ? | Person drowned while rescuing a teen-aged boy from above car |
| 30 | KS | Chase | F | adult | 7 cars swept off Kansas turnpike as rapidly rising water sent a wall of water rushing down, 5 persons in one car drowned, 1 in another |
| ? | 8 | ||||
| ? | 5 | ||||
| ? | 3 | ||||
| ? | 1 | ||||
| M | adult | ||||
| 31 | MO/KS | Jackson/Johnson | ? | ? | Person attempted to swim across flooded Indian Creek |