Houston is expected to be hit by heavy rainfall later in the week, with a slight risk of excessive rainfall on Friday in eastern and southern parts of the area. Regardless of development, showers and thunderstorms will likely move through southeast Texas.

Forecasts suggested widespread rainfall totals between 2 and 4 inches, with isolated areas seeing as much as 7 inches by Tuesday evening. Authorities emphasized the risk posed by flooding, including rapidly rising waters in streams and dangerous road conditions in both cities and rural areas.

A tropical storm may form this week, bringing risks of flash flooding and strong thunderstorms from Florida to Louisiana.

Forecasters are warning of early signs of a potential tropical cyclone developing along the northeastern Gulf of Mexico. A low-pressure system that could bring storms to Florida before moving west has a medium chance of developing into a tropical cyclone over the next several days, according to the National Hurricane Center (NHC).

A high pressure system will remain in place north of the Hawaiian Islands through the weekend keeping moderate to locally breezy trade winds into the extended range forecast. A disturbance passing through the islands today will briefly increase shower activity through the morning hours.

A disturbance called Invest 93L by the National Hurricane Center could turn into a tropical depression or the next named storm of hurricane season.

On Tuesday CenterPoint Energy notified customers it is monitoring the low-pressure system offshore of Florida's east coast, designated as Invest 93L, as it moves over the Florida Peninsula toward the Gulf.

A disorganized low-pressure area off Florida is showing increasing chances of becoming a tropical depression or tropical storm this week.