Storm surge

noun (countable)

/ˈstɔːm sɜːdʒ/

An abnormal rise in sea-water level above the predicted astronomical tide, generated by the combination of low atmospheric pressure and strong onshore winds associated with a tropical cyclone or severe storm. Storm surge is historically the deadliest element of tropical cyclones; the 1999 Odisha Super Cyclone generated a surge of approximately 5–7 metres that inundated coastal districts and caused the majority of its estimated 10,000+ deaths. The height of a storm surge depends on the storm's intensity, forward speed, angle of approach to the coast, and the bathymetric profile of the continental shelf — shallow shelves, as off the Odisha coast, amplify surge height significantly.

✍️ Usage in a UPSC answer

The Indian National Centre for Ocean Information Services (INCOIS) issues real-time storm-surge forecasts for the Bay of Bengal and Arabian Sea coasts, enabling district collectors to calculate safe evacuation distances and pre-position rescue boats at block-level relief camps before a cyclone's landfall.

Synonyms

tidal surgesea surgewind-driven floodcoastal inundationcyclonic surgestorm tide

Antonyms

sea withdrawalebbstorm-surge recessioncoastal retreat (of water)

🌱 Word Family

surge (verb/noun), surging (adjective/participle), storm-surge inundation (compound noun), tidal surge (compound noun), storm-surge model (compound noun)

🔡 Root

Old Norse stormr = storm + Latin surgere = to rise (sub- = up from below + regere = to lead, direct)

📜 Etymology

'Storm' derives from Old English storm, related to Old Norse stormr and cognate with German Sturm, all from a Proto-Germanic root meaning violent weather. 'Surge' traces to Latin surgere (to rise, spring up), a contraction of subrigere (sub- + regere, to direct upward), entering English via Middle French sourdre in the 15th century. The compound 'storm surge' as a technical oceanographic term was established in the early 20th century, gaining international standardisation through the World Meteorological Organization's guidelines on coastal hazards.

🧠 Memory Hook

A STORM SURGE is the sea 'surging' forward under the power of a storm — the wind literally pushes a wall of water onto the land. Think of blowing across a bowl of water: the air piles the water up at the far end. A hurricane does the same to the ocean on a terrifying scale, and that 'pushed-up wall' is the surge.

⚠️ Disaster Management 📖 Seen in: Disaster Management — Framework, Prepa... 📋 Also in Key Terms

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