Dead trees pose a safety risk, especially during high winds and severe storms, and removing dead trees involves a financial burden, whereas the presence of healthy trees can clean the air, increase property values, and reduce the temperature of the built environment and thereby reduce building cooling costs. During times of drought, trees can fall into water stress, which may cause a tree to become more susceptible to disease and insect problems, and ultimately may lead to a tree's death. Irrigating trees during dry periods can reduce the risk of water stress and death. Irrigation can be accomplished by use of a garden hose, soaker hose, sprinkler, or modified five-gallon bucket. Drought is an extended period of months or years when a region notes a deficiency in its water supply whether surface or underground water. Generally, this occurs when a region receives consistently below average precipitation. It can have a substantial impact on the ecosystem and agriculture of the affected region. Although droughts can persist for several years, even a short, intense drought can cause significant damage[1] and harm the local economy.[2] Succulent plants are well-adapted to survive long periods of drought. Many plant species, such as cacti, have adaptations such as reduced leaf area and waxy cuticles to enhance their ability to tolerate drought. Some others survive dry periods as buried seeds. Semi-permanent drought produces arid biomes such as deserts and grasslands. [3] Most arid ecosystems have inherently low productivity. This global phenomenon has a widespread impact on agriculture. Lengthy periods of drought have long been a key trigger for mass migration and played a key role in a number of ongoing migrations and other humanitarian crises in the Horn of Africa and the Sahel. Water scarcity involves wate stress, water deficits, water shortage and water crisis. The concept of water stress is relatively new. Water stress is the difficulty of obtaining sources of fresh water for use, because of depleting resources. A water crisis is a situation where the available potable, unpolluted water within a region is less than that region's demand.[1] A garden hose, hosepipe or simply hose is a flexible tube used to convey water. There are a number of common attachments available for the end of the hose, such as sprayers and sprinklers (which are used to concentrate water at one point or spread it over a large area). Hoses are usually attached to a hose spigot (tap). Garden hoses are commonly green and often black, but can also be found in a variety of other colors. Garden hoses are typically made of synthetic rubber or soft plastic, reinforced with an internal web of fibers. As a result of these materials, garden hoses are flexible and their smooth exterior facilitates pulling them past trees, posts and other obstacles. Garden hoses are also generally tough enough to survive scraping on rocks and being stepped on without damage or leaking. Most garden hoses are not rated for use with hot water, and their packaging will generally specify whether or not this is the case. Typical hoses used for filling of the potable water tanks in recreational vehicles are similar to garden hoses but are made of nonporous materials that are less likely to collect bacteria or affect the water's taste. They are colored white as a distinguishing characteristic. The term "hosepipe" is chiefly British, South African and southern U.S. usage; "hose" or "garden hose" is the predominant term in other English-speaking countries. The term "hose" is also used for other types of flexible, water-carrying tubes such as those used by fire departments.