Climate in Wahiawa
Wahiawa's climate follows Oahu's genuine year-round warmth, but this record discloses a real, specifically named, serious local flood hazard distinct from general Oahu weather.
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Learn moreA genuine, warm, humid central Oahu climate
Wahiawa experiences warm winters, hot summers, and humid conditions consistent with Oahu's island-wide climate pattern (base record).
Wahiawa Dam: a real, named, serious flood hazard
Wahiawa Dam (built 1906) carries the state's official 'high hazard potential' classification, meaning a failure 'will result in probable loss of human life,' with an estimated 4,000-5,000 people in the direct hazard zone in Waialua and Haleiwa (base record).
A real, dated March 2026 flooding event
Flash flooding across Oahu in March 2026 was described by multiple sources as the worst flooding Hawaii had seen in over 20 years, with rain falling at 1-3 inches per hour over central Oahu (base record).
Real hurricane risk, no direct tsunami exposure
Wahiawa carries Oahu-wide hurricane risk, though genuinely less frequent than Atlantic-basin states; its inland, central-Oahu location means it does not carry the direct coastal tsunami exposure this project's coastal Oahu records disclose (base record).
Key takeaways
- Wahiawa's climate follows Oahu's genuine, warm, year-round pattern.
- Wahiawa Dam carries a real, official 'high hazard potential' classification -- a real, disclosed, serious local flood risk.
- A real, dated March 2026 Oahu flash-flooding event illustrates central Oahu's genuine flood exposure.
- Real hurricane risk applies, but Wahiawa's inland location means no direct coastal tsunami exposure.
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