WATER:
Your chins water bottle should be large enough to sustain water for 1 full day, if possible give your chin water that is bottled and free of chlorines and flourides. FRESH WATER SHOULD BE AVAILABLE DAILY.
HEAT EXHAUSTION:
A chinchillas fur is extremely dense and should always be taken into account when considering where you are going to take your chin and where he will be housed. Too high of tempatures, direct exposure to sunlight, or poor ventilation can cause your chinchilla to go into heat exhaustion, If this happens place chin in a cool place wrap gently with a cool(not cold) cloth over the chins back and try to feed slightly cool water if conscious. If chin is unconcious take to your vet immediately.
To avoid heat prostration always make sure there is adequate ventilation, the area is not to hot(air conditioning), avoid taking your chin out into direct sunlight and hot summer days, wait until the evening time when it is much cooler. Always remember the heat for your chinchilla is like us wearing 4 winter jackets at the same time in the hot dry summer time.