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      • Environmental Impact

        Flood Watch Issued for Region Ahead of Heavy Rain

        • News Desk
          • December 21, 2025
          • 0 comments
      flooding in a canyon

      Flooding in the canyon, January 2025 (File Photo – Colin)

      A Flood Watch has been issued for our area as significant rainfall is expected to impact the region beginning Tuesday, December 23, at 4:00 pm and continuing through Wednesday, December 24, at 10:00 pm.

      By News Desk

      The watch is in effect as a moderate to strong atmospheric river is forecast to move into the area, bringing heavy rainfall that could result in widespread flooding.

      What to Expect

      • Flooding Risk:
        Excessive rainfall may cause flooding in rivers, creeks, streams, and other low-lying or flood-prone areas.
      • Timing:
        Rain is expected to begin Tuesday afternoon and continue through Wednesday evening, with periods of heavy rainfall possible.
      • Rainfall Forecast:
        Up to half an inch of rain may fall Tuesday, with rainfall rates increasing Tuesday night. Total accumulations of 3–4 inches are possible. Showers will persist through Wednesday, with heavy rain remaining a concern.

      Potential Impacts

      • Urban Flooding:
        Cities and low-lying areas could experience significant flooding due to excessive runoff.
      • Mudslides and Debris Flows:
        Steep and mountainous regions, including foothill areas, face an increased risk of mudslides and debris flows as saturated soils become unstable.
      • Strong Winds:
        Wind gusts up to 25 mph are expected Tuesday and Wednesday nights, potentially creating hazardous conditions.

      Precautionary Actions

      Residents in flood-prone areas should closely monitor local forecasts and remain alert for possible Flood Warnings. Those living in low-lying or vulnerable locations should be prepared to take action if flooding occurs. Residents in mountainous or foothill regions are urged to remain cautious due to the increased risk of mudslides.

      Extended Forecast

      • Monday:
        Partly sunny with highs around 70°F and calm winds.
      • Tuesday:
        Showers begin late in the afternoon with a high near 62°F; heavy rain expected overnight.
      • Wednesday:
        Continued heavy rain with a high near 60°F.
      • Thursday through Saturday:
        Ongoing showers with daytime highs between 58–59°F and overnight lows ranging from the mid-40s to low 50s.

      Stay safe and informed throughout this weather event.

      Tagged: Flood Watch Issued for Region Ahead of Heavy RainAltadenaPasadenaSierra Madre

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