As heavy rain cascades across South Florida, flooding could be a concern heading into the work week.

“An isolated instance of flash flooding cannot be ruled out,” forecasters at the National Weather Service in Miami warned in a hazardous weather outlook post.

Get your outdoor activities done in the mornings, as the chances for rain and thunderstorms increase in the afternoons. Here’s what you need to know about this upcoming week’s wet weather.

Weather warnings

▪ Thunderstorms: Numerous and heavy, with gusty winds and heavy downpours, thunderstorms will be prevalent through the entire week, with storm chances in the 70% to 90% range through Thursday.

▪ Flooding: Localized flooding especially across coastal metro areas could turn into instances of flash flooding.

▪ Heat: Temperatures will be in the upper-80s to around 90. Heat indexes expected around 100 to 105 degrees for most of the week.

▪ Rip currents: The rip current risk remains high across Palm Beach County beaches into the early part of the week. Miami-Dade and Broward beaches will also see elevated, and potentially high, rip current risks.

Why are storms in Miami’s forecast?

The cold front that drove the former Hurricane Lee to the north and away from the southeastern states got closer to South Florida this weekend, meteorologist Robert Garcia said earlier this week. The high pressure that had kept things dry exited and allows for an increase in showers and thunderstorm activity.

The Florida Keys should see only a 30% chance of isolated thunderstorms with the highest chances — 40% — Tuesday through Thursday.

“That front will be knocking on our door,” Garcia said last week, but it won’t quite get in as far as the Miami area goes, so don’t expect to feel particularly cooler air in South Florida.

This weak front that’s causing our weekend wetness will fade early in the week, but WSVN7 meteorologist Jackson Dill notes another front will replace it and continue the stormy weather pattern.

“With days of heavy rain potentially ahead, the risk for flooding will exist with several inches of rainfall possible over the next seven days,” Dill reported.