What is the capacity of the water can mentioned in the text?

The capacity of the water can mentioned in the text is correctly identified as 2½ gallons. This specification is important because water cans are commonly used in fire services for initial firefighting efforts, particularly for brush fires or small ignitions where quick access to water is necessary.

The 2½-gallon size strikes a balance between being portable and sufficient for addressing small fires, allowing firefighters to carry the can effectively while still providing an adequate volume of water for immediate use. It is specifically chosen to ensure that personnel can manage the weight and handle the can easily under emergency conditions.