Floods can happen during heavy rains, when ocean waves come on shore, when snow melts quickly, or when dams or levees break. Damaging flooding may happen with only a few inches of water, or it may cover a house to the rooftop. Floods can occur within minutes or over a long period, and may last days, weeks, or longer.

2025年1月14日 · Flooding is a temporary overflow of water onto land that is normally dry. Floods are the most common disaster in the United States. Failing to evacuate flooded areas or entering flood waters can lead to injury or death. Floods may: Result from rain, snow, coastal storms, storm surges and overflows of dams and other water systems.

2019年3月4日 · Interactive data visualizations for flooding related to hurricanes and flood events, quarterly streamflow summaries, and more. Access streamflow, precipitation, rate of change, NWS weather and flood stage, and more in the new National Water Dashboard. Access information and data associated with short-term, storm-event-based collection efforts.

2023年5月28日 · While flooding can occur at any time throughout the year, the U.S. is entering the peak of its so-called "flash flood season" as the calendar flips to June. Flash flooding refers to floods that develop quickly, typically within three to six hours of heavy rainfall, and occur over a relatively small area.

汛期大致划分如下： 珠江：4~9月，长江：5~10月，淮河：6~9月， 黄河：6~10月，海河：6~9月，辽河：6~9月，松花江：6~9月。 汛期是指江河中由于 流域 内 季节性 降水 、融冰、化雪，引起定时性水位上涨的时期。 我国汛期主要是由于夏季暴雨和秋季连绵阴雨造成的。 从全国来讲，汛期的起止时间不一样，主要由各地区的气候和 降水 情况决定。 南方入汛时间较早，结束时间较晚；北方入汛时间较晚，结束时间较早。 每年五至九月份，江淮 流域 降雨明显比其它月份多， …

This year, the western Gulf Coast is predicted to experience between 7 to 15 high tide flood days, the highest for the continental U.S. NOAA is predicting an above-normal 2024 Atlantic hurricane season that has the potential to increase flooding for coastal communities over the coming year.

The end of hurricane season doesn’t mean the risk for flooding ends too. Floods can happen anywhere, at any time. For the past four years, hurricanes have caused above-average flooding and, as the climate continues to change, no home is completely safe from flooding. Flood insurance gives your clients financial protection and peace of mind.

Flooding is a year-round threat, because many storm systems and other flooding risks are active throughout fall and winter. For starters, Atlantic hurricane season continues through November 30. According to the National Oceanic and Atmospheric Administration (NOAA), most tropical storm activity occurs between mid-August and mid-October ...

Most flood deaths are due to flash floods, and most fatalities occur in vehicles. What Actions Can I Take? During the monsoon season (June 15 - September 30), be sure to monitor NOAA Weather Radio or your local media. The National Weather Service issues a FLASH FLOOD WATCH to alert the residents to the possibility of a flood emergency. During ...

2019年3月21日 · Nearly two-thirds of the Lower 48 states face an elevated risk for flooding through May, with the potential for major or moderate flooding in 25 states, according to NOAA’s U.S. Spring Outlook issued today. The majority of the country is favored to experience above-average precipitation this spring, increasing the flood risk.