Weather is the conditions in the air above the earth such as wind, rain, or temperature, especially at a particular time over a particular area. Climate is the general weather condition found in a particular place.
Climate change describes a change in the average conditions — such as temperature and rainfall — in a region over a long period of time.
Scientists have observed Earth’s surface is warming, and many of the warmest years on record have happened in the past 20 years.
Temperatures have risen during the last 30 years, and 2001 to 2010 was the warmest decade ever recorded. As the Earth warms up, heat waves are becoming more common in some places.
Higher temperatures mean that heat waves are likely to happen more often and last longer, too. Heat waves can be dangerous, causing illnesses such as heat cramps and heat stroke, or even death.