An article on Global Warming

Early Warning Signs

Direct manifestations of a widespread and long-term trend toward warmer global temperatures:

Heat waves and periods of unusually warm weather
Ocean Warming; sea-level rise and coastal flooding
Glaciers Melting
Artic and Antartic warming

Events that foreshadow the types of impacts likely to become more frequent and widespread with continued warming

Spreading disease
Earlier spring arrival
Plant and animal range shifts and populations changes
Coral reef bleaching
Downpours, heavy snowfalls, and flooding
Droughts and fires