Complex sentence: After qualifying a decent 7th on the grid, race 1 took place in atrocious weather, pouring rain causing there to be rivers and puddles all over the track, which caused the racing to be very entertaining but dangerous.
Split into simpler sentences: After qualifying a decent 7th on the grid, race 1 was hugely eventful. The weather was atrocious, pouring rain causing there to be rivers and puddles all over the track, which caused the racing to be very entertaining but dangerous.