What Is Sciatica? Sciatica refers to back pain caused by a problem with the sciatic nerve. This is a large nerve that runs from the lower back down the back of each leg. When something injures or puts pressure on the sciatic nerve, it can cause pain in the lower back that spreads to the hip, buttocks, and leg. Up to 90% of people recover from sciatica without surgery.
River flooding occurs when river levels rise and overflow their banks or the edges of their main channel and inundate areas that are normally dry. River flooding can be caused by heavy rainfall, dam failures, rapid snowmelt and ice jams.
A (coastal) flood warning is issued when coastal flooding is occurring or is expected to happen in the next day. Again, moderate flooding or worse is needed to trigger a warning. If the flooding is only minor, then a coastal flood advisory will be issued instead. Courtesy: FEMA and the National Weather Service