<P> Scientists warn that global warming and climate change may result in more extensive droughts in coming years . These extensive droughts are likely to occur within the African continent due to its very low precipitation levels and high climate . </P> <P> A hailstorm is a natural hazard where a thunderstorm produces numerous hailstones which damage the location in which they fall . Hailstorms can be especially devastating to farm fields, ruining crops and damaging equipment . </P> <P> A heat wave is a hazard characterized by heat which is considered extreme and unusual in the area in which it occurs . Heat waves are rare and require specific combinations of weather events to take place, and may include temperature inversions, katabatic winds, or other phenomena . There is potential for longer - term events causing global warming, including stadial events (the opposite to glacial "ice age" events), or through human - induced climatic warming . </P> <P> Hurricane, tropical cyclone, and typhoon are different names for the same phenomenon: a cyclonic storm system that forms over the oceans . It is caused by evaporated water that comes off of the ocean and becomes a storm . The Coriolis effect causes the storms to spin. 74 mph (119 km / h). Hurricane is used for these phenomena in the Atlantic and eastern Pacific Oceans, tropical cyclone in the Indian, and typhoon in the western Pacific . </P>

Which of these is most closely related to an examination of the events of nature