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Flood-Flashflood-2.pptxdjgodixifieixockdks
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- 2. impending signs ofa flashflood 1. weather forecasts typhoon or thunderstorm – they may bring intense and prolonged rainfall. 2. water collecting in puddles and rapidly rising water – this could mean that the ground is saturated with water and flooding may follow. Water could be stocked up in a distant area and a flash flood could occur anytime soon. 3. muddy water – this may mean that calm water has been disturbed and the dirt has mixed with the water. 4. roaring sound from upstream – this may be from stones, branches, or logs being carried in the water. 5. floating debris in water – twigs, leaves, and sticks may be from bigger branches and logs carried by the water
- 3. FLOOD HAZARD MAP • Atool that determines flood zone areas due to different hazards such as storm, surge waves, sea level. The NOAH Nationwide Operational Assessment website displays the PAGASA radar data, rainfall measurements of rain gauges of DOST, and has flood hazard maps in the Philippines. Nationwide Operational Assessment of Hazards or NOAH, a program under the Department of Science and Technology (DOST), advance the use of cutting edge technology and recommend innovative information services in government’s disaster prevention and mitigation efforts. DOST-NOAH can be accessed online at http://noah.up.edu.ph/. Below is a screen shot from the Project NOAH web page, indicating the flood prone areas of Manila. Note the meaning of the colors indicated on the left of the screen shot.
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- 6. Storm surge • Stormsurge is a rapid rise of seawater above normal sea level on the coast, • generated by strong winds brought about by typhoons and thunderstorms. • This means that the impending signs of storm surge are similar to that of the two aforementioned hazards. • Unlike a tsunami that has visual signs such as receding water level, a storm surge is a rather fast and unexpected hazard that can sneak in anytime during a storm. • It is advised that residents of low-lying coastal areas should • evacuate upon observing signs of an incoming storm.
- 7. Precautionary measures Before DuringAfter • Learn about your area’s vulnerability to storm surge by looking at past events. If vulnerable, recommend relocation to safer grounds • Stay away from beaches/ shore during tropical cyclone passage • Regularly monitor officials storm surge advisory/ forecast updates of PAGASA • Remain calm and be ready in case of evaluation • check structural damage of your surroundings and make sure structures are safe from collapsing • Check surroundings for electrical damage
- 8. Precautionary measures Before DuringAfter • Identify evacuation routes leading to safe higher grounds • Establish evacuation plans and procedure • Participate actively in the school drills on disaster response • Stay away from beaches/shore and low lying areas • Head towards inland away from potential low of water • Turn off power supply • stay away from flood waters • It is possible to contract diseases from flood water • Uneven ground, open drainage and or sharp debris under floodwater can be potentially harm • `
- 9. Precautionary measures Before DuringAfter •Participate actively in the school drills on disaster response • if caught in a storm surge, you are advised to hold on large strutures like big trees •clean all mud and debris • `
- 10. El Niño andLa Niña: What Are They?
- 11. • Both ElNiño and La Niña are opposite results of ENSO (El Niño Southern Oscillation), the same phenomenon. • They are an oscillation in temperatures between the Eastern Equatorial Pacific region's atmosphere and ocean, roughly between the International Dateline and 20 degrees west. • Building up between June and December, • El Niño is caused by a change in wind patterns. Here, after Asia's summer monsoons, the Pacific Trade Winds struggle to replenish • The moist air contributes to an oscillation between the colder and warmer waters, resulting in warmer than average ocean temperatures.
- 12. El Niño &La Niña Affect Health Conditions Extreme climatic conditions are characterized by the El Niño phenomenon; high temperature rises with a little rainfall, and extremely heavy rainfall occurs at the opposite end. According to the Philippines Department of Health, El Niño effects health such as • Diseases related to water scarcity or shortage such as diarrhea and skin diseases •Red Tide Blooms : Paralytic shellfish poisoning • Disorders associated with high temperatures: heat cramps, heat exhaustion, exertional heat injury and heat stroke
- 13. •Stronger winds alongthe equatorial region, especially in the Pacific, Decreased convection in the Pacific leading to a weaker jet stream •temperatures are above average in the southeast and below average in the northwest, •Conditions are more favorable for hurricanes in the Caribbean and central Atlantic area, •Greater instances of tornados in those states of the US already vulnerable to them
- 14. Precautionary measures ELNIÑO BEFORE •Listen and monitor PAGSA EL Niño/ drought/ dry spell forecast on what parts of the country will be affected severe conditions •Plan your daily activities to avoid doing strenuous work during the hottest time of the day •Learn about the symptoms of heat stress or exposure to extreme environmental heat, sunburn, heat exhaustion, heat stroke, dehydration…
- 15. Precautionary measures ELNIÑO DURING •Avoid doing strenuous activity during hottest time of day •Keep hydrated •During drought condition, conserve water •Stay indoor whenever possible •Regularly clean electric fans and air-condition •Wear light colored and lightweight clothing •Never leave children or pets alone in closed vehicles •Seek medical attention if you or another person experiences symptoms of heat stress
- 16. Precautionary measures ELNIÑO AFTER •Seek medical attention if you or another person experiences symptoms of heat stress