You must remember that your acoustic guitar is affected by humidity and the temperature. This is because the acoustic guitar is made of wood, which is typically thin. It is best to not store

This is just a ballpark figure, but if either gets exposed to these it will put your acoustic guitar in serious risk of warping or the finish could crack.
Usually if the humidity is rising slowly or gradually it does not hurt of damage your acoustic guitar. In the case of exposure to extremely high humidity along with a high temperature the glue joints could become weakened and could possibly separate. This could also affect the glue which is under the bridge could deteriorate, which might cause the bridge to come off.
Be sure to clean the fretboard on a regular basis. Build up of particles and other things will buildup and could block the strings if it gets too high.
Try to change the strings on a regular basis. Older strings can break off and possibly hit you. Changing the strings will improve the sound of your guitar.
One of the most important things you should do is purchase good case for your acoustic guitar. Be sure to always store your acoustic guitar in this when not in use.
If you have an damages to your acoustic guitar you should have it repaired by a professional.