Since January, more than 3,100 flash flood warnings have been issued nationwide — the highest year-to-date total since tracking began for alerts in 1986.

Here's what to know about flash floods, emergency systems and how to stay safe as Florida is in the Atlantic hurricane season.

A flash flood emergency is the rarest and most dire flooding alert that can be issued by the National Weather Service. Knowing what to do could save your life.

According to the Weather Channel, a flash flood emergency is a rare alert issued by the National Weather Service that serves as a signal that you’re likely in imminent danger. A flash flood warning is issued by the NWS when flash flooding is either already happening or expected to develop soon.

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Even when floods can be anticipated, communicating their severity to the public is a tall order. Because flash floods are very localized, even neighborhood-level warnings may seem like false alarms to some residents, leading to what the journalist Zoë Schlanger has dubbed “ alert fatigue .”

A flash flood warning was in effect in New York City until 9:45 p.m., and New Jersey Gov. Phil Murphy declared a state of emergency. Middlesex, Morris and Somerset counties remained under a flood warning until 7:15 a.m. Tuesday.

New Yorkers in basement apartments were told to be ready to leave and New Jersey’s governor declared a state of emergency after heavy rains in the northeast caused flash flooding, officials said

HONOLULU (HawaiiNewsNow) - A flash flood warning has been extended until 11 a.m. for north Kauai as heavy rain from earlier this morning is causing flooding. The National Weather Service in Honolulu said the warning is in effect for the area including Hanalei, Princeville, Kapaa, North Fork Wailua Trail, Wailua Homestead and Wainiha.

Severe flash flooding across the tri-state area on Monday caused major subway delays and road closures across the Big Apple and pushed New Jersey to declare a state of emergency. All five boroughs and Nassau County were under a flash flood warning through midnight, according to the National Weather Service.