Tim Fitzharris / Lightning strike near rock formation, Church Rock, Red Rock State Park, New Mexico

Vincent Grafhorst / Thunder storm with lightning bolts at sunset over Kalahari, Khutse Game Reserve, Botswana

Aflo / Y-10805 Forked lightning racing across sky at night

Wild Wonders of Europe / Maitland / Ray of light shining through thunder clouds over Lake Ohrid, Galicica National Park, Macedonia, June 2009

Juergen Freund / Burner inflating Raging Thunder hot air balloon, Mareeba, Atherton Tablelands, Queensland, Australia

Jim Brandenburg / Prairie under threatening thunder clouds, South Dakota

Gerry Ellis / Altocumulus thunder head dumping rain on pan, Amboseli National Park, Kenya

Jim Brandenburg / American Bison (Bison bison) pair grazing on prairie under an anvil cloud, Nebraska

Ashley Cooper / Water spout caused by a severe thunder storm over Sivota, Greece. June 2014

Ashley Cooper / Water spout caused by a severe thunder storm over Sivota, Greece. June 2014

Ashley Cooper / Thunder storm passing over the Langdale Pikes, Lake District, England, UK. May 2012

Ashley Cooper / Thunder storm passing over the Langdale Pikes, Lake District, England, UK. May 2012