A severe thunderstorm was moving through eastern San Diego County Monday afternoon, prompting the National Weather Service to issue a flash flood warning for parts of the mountains and deserts. A monsoonal storm was bringing the possibility of heavy rainfall,

The NWS Phoenix AZ released a flash flood warning at 3 p.m. on Monday in effect until 7 p.m. for Imperial County.

The National Weather Service (NWS) is warning that heavy rainfall could produce flash flooding across eight states, potentially impacting millions of people. The NWS posted on Facebook on Sunday afternoon to alert people in California,