The heaviest rains took place between May 27 and 28, with conditions similar to a tropical storm occurring during the overnight hours.

Researchers think this is the case with heart attacks, which commonly occur during the first few hours after people wake up.

Night combat is combat that occurs during the hours of darkness.

Several minor crimes had occurred during the past twenty-four hours.

Most of the drug-related arrests occur during the late hours of the night, he said.

Significant, but not rapid, intensification occurred during the next several hours.

Early complications were defined as those occurring during or within the first 72 hours after the procedure and were present in six patients (15%).

The accident occurred during the hours of darkness.

The satellite photograph received on the morning of December 1 showed that significant organization had occurred in the cloud mass during the previous 24 hours.

There were several aftershocks: at least 56 of them occurred during the first 24 hours after the beginning tremors.