De Una

Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Since the early 20th century, Earth's mean surfacetemperature has increased by about 0.8 °C (1.4 °F), with about two-thirds of the increase occurring since 1980. Warming of the climate system is unequivocal, and scientists are more than 90% certainthat it is primarily caused by increasing concentrations of greenhouse gases produced by human activities such as the burning of fossil fuels and deforestation. These findings are recognized by thenational science academies of all major industrialized nations.
Drought
A drought is an extended period of months or years when a region notes a deficiency in its water supply whether surface orunderground water. Generally, this occurs when a region receives consistently below average precipitation
causes
Generally, rainfall is related to the amount and dew point [determined by air temperature]of water vapour carried by regional atmosphere, combined with the upward forcing of the air mass containing that water vapour. If these combined factors do not support precipitation volumes sufficientto reach the surface, the result is a drought

Floods
A flood is an overflow of water that submerges land. The European Union (EU) Floods Directive defines a flood as a covering by water of landnot normally covered by water.
Causes and types
Natural floods are the floods that are caused naturally by the overflow of the huge volume of water, from rivers, lakes, oceans, or by heavy rains ordownpours, hurricanes, cyclones, or tsunamis, etc. Natural floods could be Riverine floods – caused by rivers; Estuarine floods – caused by a combination of sea tidal surges and storm-force winds; orCoastal floods – caused by cyclones, hurricanes and tsunamis. These are one of the most common natural disasters.

Extreme weather
Extreme weather includes unusual, severe or unseasonal weather;...