The Memorial Day weekend kicked off with a multi-day thunderstorm and heavy rainfall system hitting the south-central part of the country, forecasters said. Nearly 4 million people were under a severe thunderstorm watch the morning of Saturday,

Weather and flood threats increase into holiday weekend. Any pause in storminess after the week-long barrage that ended Wednesday is short-lived, as severe weather and flood threats increase into Memorial Day weekend across a big chunk of the south-central United States.

Whether you are traveling or planning outdoor activities, weather conditions this Memorial Day weekend could be a factor to weigh into your decision-making, especially in the central and southern U.S.