Simplify the following text for a Grade 9 native English-speaking person.
Original: When the race was moved to an April date in 2000 , rainy conditions turned the fields used for car parking into mud baths , causing chaos for spectators trying to park .
Simplified: When the race date was moved to April in 2000 ) heavy rain turned the fields used for parking into mud pits , causing sever problems for the spectators trying to park .