Here's why:

* Boiling Point Elevation: Adding salt (or any solute) to water raises its boiling point. This is because the dissolved salt molecules interfere with the water molecules' ability to escape into the vapor phase.

* The Effect of Salt: The more salt you dissolve in water, the higher the boiling point will be. However, the effect is relatively small. For example, adding a tablespoon of salt to a pot of water will only raise the boiling point by a few degrees Fahrenheit.

In short: Salt water will boil, but it will take a slightly higher temperature than regular water to reach the boiling point.