The Hawaii Emergency Management Agency has postponed its monthly test of the statewide outdoor warning siren system today to avoid confusion as a powerful storm dumps heavy rain throughout the islands.

“Current severe weather conditions may cause area residents to mistake the testing of the siren for an actual emergency alert,” agency officials said in a news release.

The test has been rescheduled for Friday. It is usually conducted at 11:45 a.m. on the first business day of the month.

Heavy rain has led to several ongoing flood advisories and warnings throughout Hawaii this morning, and the rain is expected to continue into the evening.