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An arc flash is the light and heat produced from an electric arc supplied with sufficient electrical energy to cause substantial damage, harm, fire, or injury. Electrical arcs experience negative incremental resistance , which causes the electrical resistance to decrease as the arc temperature increases.
This discharge generates heat, which can break down the wire's insulation and trigger an electrical fire. Arc faults can range in current from a few amps up to thousands of amps, and are highly variable in strength and duration. Some common causes of arc fault are loose wire connections, over heated wires, or wires pinched by furniture.
Flash floods can cause rapid soil erosion. [14] Much of the Nile delta sedimentation may come from flash flooding in the desert areas that drain into the Nile River. [15] However, flash floods of short duration produce relatively little bedrock erosion or channel widening, having their greatest impact from sedimentation on the floodplain. [16]
Flooding is a threat across the United States year-round. In the first few weeks of July, the dangers of flash floods have plagued the Northeast, including Vermont's worst flood in over 100 years ...
Flood, flash flood, coastal flooding; Hail; High winds – 93 km/h(58 mph) or higher. Lightning; Thundersnow, Snowsquall; Tornado; Windstorm (gradient pressure induced) Severe thunderstorm (hailstorm, downburst: microbursts and macrobursts)
A power flash is a flash of light caused by arcing electrical discharges from damaged electrical equipment, most often severed or arcing power lines. They are often caused by strong winds, especially those from tropical cyclones and tornadoes , and occasionally by intense downbursts and derechoes .
Torrential rains caused a flash flood on Indonesia's eastern Ternate Island, sweeping away residential areas and leaving 13 people dead on Sunday, officials said. The deluges cut off the main road ...
Flash flooding can frequently occur in slow-moving thunderstorms and are usually caused by the heavy liquid precipitation that accompanies it. Flash floods are most common in densely populated urban environments, where less plants and bodies of water are presented to absorb and contain the extra water.
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