Tsunami monitoring stations have recorded the arrival of a tsunami at the Midway Islands on 30 July 2025, the final measurement point before the Hawaiian archipelago. Observers reported rapid fluctuations in sea level, including receding waters that typically precede larger incoming waves. Subsequent readings indicated wave heights ranging between 5 and 7 feet, according to real-time coastal sensors. Emergency agencies are now focusing on the potential impact to Hawaii, which lies downstream of the Midway Islands with no further monitoring stations in between.