Question

select the best evidence to support the statement that its not always easy to tell when a flood will occur.

floods are one of the most common hazards in the united states. flood effects can be local, impacting a neighborhood or community, or very large, affecting entire river basins and multiple states.

however, all floods are not alike. some floods develop slowly, sometimes over a period of days. but flash floods can develop quickly, sometimes in just a few minutes and without any visible signs of rain. flash floods often have a dangerous wall of roaring water that carries rocks, mud, and other debris and can sweep away most things in its path.

from federal emergency management agency, \are you ready?: an in-depth guide to citizen preparedness.\

Explanation:

To support the statement that it's not always easy to tell when a flood will occur, we need evidence about the unpredictability of flood timing. The relevant part is: "But flash floods can develop quickly, sometimes in just a few minutes and without any visible signs of rain." This shows that flash floods can happen rapidly and without obvious cues, making it hard to predict their occurrence, unlike some slower - developing floods. The first part about the commonality and scale of floods doesn't relate to predictability.

Answer:

But flash floods can develop quickly, sometimes in just a few minutes and without any visible signs of rain.