Schistosomiasis (also known as Bilharzia, snail fever, or Katayama fever) is caused by flatworm parasites that live in the blood vessels of the bladder and intestines. Schistosomiasis - also known as bilharzia, snail fever, or Katayama fever - is caused by flatworm parasites that live in the blood vessels of the bladder and intestines. Health Matters
A Tornado warning means A tornado has been  spotted/touched down in your alert area. You should take  cover if a tornado warning is issued for your area;  go into a cellar, or the lowest, most inner part of your house  where there are no windows (a downstairs or basement bathroom is  ideal).
When a Tornado warning is issued: You should move to your Tornado Safe Roomâ¢ storm shelter or basement, lower floor interior hallway or room. If you are in an automobile, leave the car, find a low spot (culvert, drainage ditch), and lie flat on the ground. Do not try to outdrive a tornado.