Houston Astros starter Hunter Brown was replaced on the American League roster for the All-Star Game on Wednesday, the league announced, with Minnesota Twins right-hander Joe Ryan taking his place.

"Heavy rain is already moving through Louisiana and will continue over the next few days," AccuWeather's Alex DaSilva said.

Downpours are expected in Houston on Friday as a tropical disturbance along the northern coast of the Gulf of Mexico stalls without strengthening.

A tropical system near Florida is expected to move into the Gulf, bringing rain and potential flooding to Houston and the Gulf Coast. KPRC 2’s meteorologist explains what to expect as the week unfolds.

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).

Much of the Houston and Galveston area is expected to experience heavy rainfall and scattered thunderstorms on Friday as remnants of a tropical disturbance that made its way from Florida move out of the Gulf.

A tropical disturbance is bringing heavy rain to the Gulf Coast, putting millions at risk of flash flooding through the weekend. CBS News' Kati Weis has the latest.