1. LIGHTNING: A DANGEROUS AND UNPREDICTABLE GLOBAL NATURAL HAZARD
Walter Hays, Global Alliance for Disaster Reduction, Vienna, Virginia, USA 
lecture by Walter Hays Uploading date: June 11, 2015
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2. LIGHTNING: IGNORE AT YOUR OWN PERIL
AT THIS VERY MOMENT,
1,800 THUNDERSTORMS ARE HAPPENING SOMEWHERE ON EARTH

5. LIGHTNING
Every year, the Earth experiences an average of 25 million lightning strikes during some 100,000 thunderstorms.

6. LIGHTNING
That means: people some-where in the world are at risk every second from more than 100 lightning bolts.

7. KNOWLEDGE - Perspectives
BOOK OF
KNOWLEDGE Perspectives
On Science, Policy,
And Change

8. BOOKS OF KNOWLEDGE
Are “TOOLS” that decisionmakers can use to facilitate the minimization of the likely impacts of lightning through public and professional educational programs.

9. negative charge in the cloud - - -
THE PHYSICS
cumulonimbus clouds
negative charge in the cloud - - -
- - - creates positive charge on ground
LIGHTNING
air to ground elect-rical circuit - - -
- - - creates a bolt of lightning reaching - - -
DISASTER LABORATORIES
,000 degrees F
traveling at 100+ kph

10. Florida—deadliest state
THE IMPACTS
2,000 deaths/yr globally
200 deaths/yr In USA
Florida—deadliest state
LIGHTNING
Probability of death: 1:2,000,000
71 % have survived when struck
Lightning Safety Tips
(CDC)
DISASTER LABORATORIES
Survivors live with- - -
physical and psycho-logical problems