Your bees need access to water so that they can dilute their honey and keep the hive cool. Chances are they'll find it themselves somewhere nearby, but you can help them out by making it readily available.
Bees are lousy swimmers, so they need to be able to get right down to the water without falling in. We float wine corks (always in ready supply at our house) in a small pan, and it's a popular spot whenever the weather is dry.
