A "100-year flood" means a 1% chance of that level of flooding happening each year. Houston saw three 500-year flood events within three years from 2015 to 2017, including Hurricane Harvey.

With the potential for once-in-a-lifetime rainfall and widespread impacts, historic flash flooding is increasingly likely across parts of the nation through Saturday, fueled by repeated rounds of ...

As if that weren’t enough, Wednesday will also be the start of a multi-day, once-in-a-lifetime flooding event. • Severe thunderstorms ongoing: A powerful line of severe storms stretched from ...

Southwestern Ontarians could be in store for the worst flooding in seven years as up to 75 millimetres of rain is expected to fall by early Thursday, the Upper Thames River Conservation Authority ...

Minor flooding is possible for the Richmond, Wilsons, Clarence, Bellinger, and Upper Macintyre Rivers. A Flood Watch is also current for Queensland including the Border Rivers. Catchments in the ...

MINOR TO MODERATE FLOODING OCCURRING IN PARTS OF THE NORTHERN RIVERS, MID NORTH COAST AND NORTH WEST SLOPES Settled conditions are forecast to develop across most of New South Wales early this ...

Major flood warnings are still in place in parts of Queensland as "widespread" heavy rain smashes the state. Flood waters over Toompine Road in the Quilpie area. Photo: Lauran Gilligan Up to 100mm ...

By John Yoon Severe flooding swept South Texas and cities across the border in Mexico on Thursday, as half a year’s rainfall drenched the region in less than two days. Officials warned of more ...

Keep the Sheep campaigners heartened by the overwhelming support from people living in Perth say they are eager to show them that farmers are not a “bunch of country hicks”. Hundreds of cars and ...

MCALLEN, Texas (ValleyCentral) — South Texas Health System in McAllen is cleaning up after experiencing flooding at its medical facility when a stormwater drain cap cover broke. STHS is ...