Here’s what to know about how scientists determine how extreme a flood is and how common these extreme events are becoming.

For example, a meteorologist can look at the average recurrence interval of an anticipated flood ... falls back to the ground as rain or snow. “We’ve absolutely seen a shift in the probability ...

Several counties across the UK could see snow in the coming weeks, according to long-range weather maps. While temperatures have risen in recent weeks with spring underway, new weather maps ...