Creatures

• Mega Shark vs Giant Octopus (2009)
• Boa vs Python (2004)
• Snakes On A Plane (2006)
• Malibu Shark Attack (2009)

Floods/Tsunamis/Tidal Waves/etc.

• Titanic 2 (2010)
• Killer Flood: The Day the Dam Broke (2003)

Meteors/Comets/etc.

• Quantum Apocalypse (2010)
• Impact (2008)
• Meteor Storm (2010)

Robots

• Transmorphers: Fall of Man (2009)

Storms/Tornadoes/Hurricanes/etc.

• Twister (1996)
• Ice Twisters (2009)
• Nuclear Hurricane (2007)
• Tornado Valley (2009)

Viruses

• Contagion (2001)
• Toxic Skies (2008)

Volcanoes

• Dantes Peak (1997)
• Lava Storm (2008)
• Volcano (1997)
• Disaster Zone: Volcano In New York (2006)