(The bumping against the Earth kind)
Asteroid and Comet Impact Hazards
NASA B612 Foundation
Goal is to be able to significantly alter the orbit of an asteroid in a controlled manner by 2015 Comets
NASA Is Earth in Danger of Being Hit by an Asteroid?
NASA Late, Great Planet Earth, The
Investigate Magazine Near-Earth Asteroid Tracking
NASA Spaceguard
International, private organization that observes and tracks Near-Earth Objects (NEOs): asteroids and comets that could represent a threat to the Earth's ecosystem in case of an impact Torino Scale
Asteroid danger scale

Earthquake Hazards Program
USGS Earthquakes
U.S. Federal Emergency Management Agency (FEMA) Earthquakes
Extensive information from the San Francisco Chronicle Do's and Don'ts Putting Down Roots in Earthquake Country Make your own preparedness kit Make your home safe Earthquake Preparation
Red Cross Earthquakes
U.S. Geological Survey National Earthquake Information Center
U.S. Geological Survey (USGS) Restless Planet, The: Earthquakes
From PBS television's Savage Earth series Syzygy
Earthquake prediction online Yahoo - Earthquakes and Volcanoes
News stories

Great Depression, The
Public Broadcasting System (PBS) Greatest Market Crashes of History
From tulip bulb to dot.com Stock Market Crash
PBS Urban Survival.com
Anticipating economic collapse - long wave economic news

Floods
U.S. Federal Emergency Management Agency (FEMA) Floods
National Oceanic and Atmospheric Administration (NOAA) Flood and Flash Flood Preparation
Red Cross Map of Flood and High Flow Conditions
U.S. Geological Survey

Gas (Methane) Hydrates (Hah! Here's one we bet you hadn't been worrying about. Well, you can now.)
Civilization Could End in a Giant Methane Belch
Toronto Globe and Mail Gas (Methane) Hydrates—A NEw Frontier
U.S. Geological Survey (USGS) National Methane Hydrate R&D Program
U.S. Dept. of Energy Gas Hydrate Studies
USGS Methane Hydrates Could Strongly Amplify Global Warming
Greenpeace

(Resulting in at least five other calamities)
A Modest Proposal to Save the Planet
Contraction and Convergence—Decreasing global emissions of carbon dioxide with justice and fairness Abrupt Climate Change
Woods Hole Oceanographic Institution Apocalypse Now: How Mankind is Sleepwalking to the End of the Earth
- Are We on the Brink of a New "Little Ice Age"?
- Ocean Monitoring Systems
- Should We Be Worried Climate
From Columbia University's Earth Institute EPA Global Warming Site
U.S. Environmental Protection Agency How Global Warming May Cause the Next Ice Age
By Thom Hartmann Intergovernmental Panel on Climate Change
Established by the World Meteorological Organization and the United Nations Environment Programme Pentagon Abrupt Climate Change Study
- Global Business Network comments with link to PDF file

Gulf Stream Shutdown
Comprehensive metadirectory of information on Gulf Stream Shutdown—websites, articles, books, news

Hail
National Oceanic and Atmospheric Administration (NOAA) Hail
National Weather Service Hailstorms
Chase Day

Extreme Heat
FEMA Heat Wave Preparation
Red Cross

(If you live in Florida, you may have heard of these)
The terms "hurricane" and "typhoon" are regionally specific names for a strong "tropical cyclone".
Tropical cyclones with maximum sustained surface winds of less than 39 mph are called "tropical depressions" Once the tropical cyclone reaches winds of at least 39 mph they are typically called a "tropical storm" and assigned a name. If winds reach 74 mph), they are called:
"hurricane" (the North Atlantic Ocean, the Northeast Pacific Ocean east of the dateline, or the South Pacific Ocean east of 160E)
"typhoon" (the Northwest Pacific Ocean west of the dateline)
"severe tropical cyclone" (the Southwest Pacific Ocean west of 160E or Southeast Indian Ocean east of 90E)
"severe cyclonic storm" (the North Indian Ocean)
"tropical cyclone" (the Southwest Indian Ocean)
Frequently Asked Questions
NOAA Hurricane Preparation
Red Cross Hurricanes
NOAA Hurricanes
U.S. Federal Emergency Management Agency (FEMA) Hurricanes
U.S. Geological Survey National Hurricane Center
U.S.National Weather Service

FEMA Landslides
U.S. Geological Survey

NOAA A Lightning Primer
NASA How Lightning Works
How Stuff Works Lightning Safety
National Weather Service

(Use 'em or lose 'em. U.S., U.K., Russia, France, Israel, Iran, India, Pakistan, China, North Korea—join the club)
Effects of a Global Thermonuclear War Effects of Nuclear War
Federation of American Scientists Exposing the U.S. Nuclear War Plan
National Resources Defense Council Helen Caldicott
Long-time advocate for disarmament International Physicians for the Prevention of Nuclear War
Activist anti-nuclear group List of Countries with Nuclear Weapons
Wikipedia Nuclear War Survival Skills
Free online book Nuclear Warfare
Wikipedia Nuclear Weapon Archive
A guide to nuclear weapons Nuclearfiles.org
Everything you need to know about nuclear age history
Nuclear accident
FUKUSHIMA is happening

Peak Oil
The world's societies are needing more and more oil. We're about to be producing less and less. Do the reasoning
DryDipstick
This site will direct you to everything you need to know about Peak Oil. News and commentary, websites, books, articles, VDDs, Internet forums, community groups

(Noticed any interesting new diseases lately?)
Bird Flu Protection Coming Plague, The
Book by award-winning writer Laurie Garrett on newly emerging diseases in a world out of balance Dead Zone, The
Seven bodies buried in the Artic tundra might solve the riddle of the worst flu pandemic in history -- and might help us prevent it from happening again Influenza 1918
PBS Influenza Pandemic of 1918, The Influenza Pandemics
Centers for Disease Control (CDC) List of Epidemics / Pandemics
Wikipedia Next Influenza Panic, The
Article by pediatrician Pandemic Influenza
U.S. Dept of Health and Human Services Pandemics
From MedMall.org Pandemics and Pandemic Scares in the 20th Century
U.S. Dept of Health and Human Services Plagues and People
Book on the influence of infectious diseases on the course of history Spanish Flu
Wikipedia