Elk River, Minnesota

                ... severe thunderstorm safety rules...

Severe thunderstorms produce strong damaging winds... large hail...
heavy rain and deadly lightning. Stay indoors and away from windows.
Stay away from areas with loose items that could become flying debris.
Severe thunderstorms can sometimes produce straightline winds in excess
of 100 mph. Remember that severe thunderstorms can also produce
tornadoes with little or no warning.

Lightning is the single worst killer so stay indoors and avoid using
electrical appliances. You should get away from open fields and off
any heavy equipment. Avoid solitary trees. If near a lake... get away
from the water and to shelter as quickly as possible.