You can get this deadly disease by mosquitos.
Mosquitos appear in standing water.
Keeping water in a birdbath for example will attract mosquitos after being there for a couple of days. Once mosquitos are attracted to the standing water then they start to breed which means that you are at an even greater risk due to the fact of more mosquitos. Other places that you can find mosquitos is in old tires, leaky outdoor faucets, and old plastic pools. If you wish to avoid these disease carrying mosquitos be sure to change water that is in a flower vase about two times every week and keep your swimming pool clean and properly chlorinated. Try to clean up your yard before it gets to hot so that you won't have to worry about these problems while you are enjoying your vacation.