Full Notification

HNL Alert from the Oahu Department of Emergency Management

Issued: 11:05 AM 03-10-2026  

Severe Weather Update 1: March 2026 Kona Low Storm

Details 

Weather conditions are expected to worsen over Oahu tonight (Tuesday) and continue through the end of the week as a Kona storm impacts the state. A combination of heavy rains, high winds, and the potential for thunderstorms will create dangerous conditions. Heavy rains may cause flooding. Be aware of nearby streams, drainage channels, roads, ditches, and other areas known to flood. High winds can cause downed trees and power outages.

• A Flood Watch goes into effect tonight through Saturday.
• A Special Weather Statement has been issued for the state highlighting the threat of flooding and concern about severe thunderstorms.

The City and County of Honolulu began preparation for the storm and coordination with partner agencies late last week. Mayor Blangiardi has issued an Emergency Proclamation ahead of expected impacts. City crews have been clearing stream mouths and checking for blockages. In anticipation of the storm, there may be schedule changes or closures of City services and facilities. Monitor for updates.

Residents and visitors are urged to use caution when outdoors and to prepare for potential power outages.

• Turn around, don’t drown! Do not attempt to walk, swim, or drive through flowing or rising water. Floodwaters can rise rapidly. Just one foot of moving water can sweep away a vehicle. If your vehicle is caught in rapidly moving water, stay inside. If water begins to rise inside the vehicle, get on the roof.
• Protect your home: Secure outdoor items so they do not become projectiles in high winds. Clear gutters and drains around your property to help prevent flooding.
• Drive carefully: Roads may be blocked or partially closed due to fallen trees, rocks, or debris. Use caution and watch for first responders and crews working in the area. Be aware of officers directing traffic. If a traffic signal is out or malfunctioning, treat the intersection as a four-way stop.
• Use extreme caution outdoors. Limit outdoor activities. High winds can cause falling rocks or branches and dangerous ocean conditions. Do not cross flooded streams. Streambeds that appear dry can quickly flood due to rain upstream, even if it is not raining where you are.
• Prepare for power outages: Keep back up batteries for flashlights, cell phones, and medical equipment charged and ready. Fill water containers. Turn your refrigerator and freezer to their coldest settings.

Stay Informed

Additional updates will be issued as the situation develops or if there are significant changes to the weather forecast. Follow DEM on social media, encourage others to sign up for HNL Alert, and monitor local TV/radio. Help keep lines clear for first responders. Call 911 for emergencies only. Do not call 911 for general information updates.

Learn more about emergency preparedness and how to protect your family at honolulu.gov/dem.

Mahalo and stay safe!