For each question below, select either flash flood, widespread flood, or coastal flood. this type of flood is the most costly. this type of flood is the most deadly. this type of flood is most common in july. this type of flood is often enhanced by snowmelt. this type of flood is often caused by storm surge. this type of flood is most common in mountainous regions. this type of flood occurs along major river systems, like the mississippi. this type of flood is most common on small rivers and streams. this type of flood is sometimes caused by nor’easters. this type of flood is often caused by slow-moving thunderstorms.