The National Weather Service says thunderstorms are expected to cause flash flooding in parts of Bannock and Caribou counties late Monday afternoon through early Monday evening.

The weather service has declared a flash flood warning to alert the public of the expected hazardous conditions in north central Bannock County including the Inkom area and in western Caribou County.

The flash flooding could be most severe along Inman and Rapid creeks.

The weather service reported "Doppler radar indicated thunderstorms producing heavy rain across the warned area. Flash flooding is ongoing or expected to begin shortly."

The weather service said there will be "flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas."

The weather service warned, "Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route."