Friday is expected to be warm and humid with the chance of isolated thunderstorms later in the day. However, flood concerns remain for the weekend.

Cold front brings cooler air, widespread storms and flash flooding risk across Texas as it stalls midweek with heavy rain possible.

While one or two days of heavy rainfall isn't atypical for Houston, forecasters warn that this prolonged series of storms elevates flood concerns. "Only rarely have we seen periods of several days of moderate to heavy rainfall as we are now experiencing,

The Texas A&M urban flood study found that cities can actually change the weather, depending on the type of weather event.