Update, 2:25 p.m.
Parts of Galveston County received almost 10 inches of rain on Tuesday morning, according to the National Weather Service.
The rain caused widespread street flooding and caused water to go into some homes in Texas City.
In a briefing this afternoon, the weather service said there were rounds of showers and thunderstorms possible over the next two days. Forecasters did not expect the same amount of heavy rain over the next two days.
In the same briefing, the weather service upgraded the chances that a tropical disturbance currently near the Yucatan Peninsula has a 70 percent chance of forming into a tropical storm in the next five days.
Update, 11:35 a.m.
The city of Galveston has canceled Galveston Island Trolley service to downtown. All other Island Transit and trolley routes are operating normally, the city said.
Downtown trolley service will return on Wednesday, the city said.
Update, 8:55 a.m.
House flooding in Texas City right now is minor, Texas City Emergency Management Coordinator Tom Munoz said.
The house flooding has been reported on Meadowlark Lane and Edward Street, among other areas.
One elderly couple has been evacuated from a home, Munoz said. Emergency responders have performed about five vehicle rescues, he said.
Munoz advised against traveling in the city.
"Stay indoors if at all possible," he said.
Update, 8:45 a.m.
The National Weather Service in League City has issued a flash flood warning for southern parts of Galveston County until 10:45 a.m.
There is moderate rainfall in the Texas City area this morning, and some homes in the western part of the city are flooding, according to the weather service.
The rain will continue at a moderate rate for another hour, and then decrease in intensity, according to the weather service.
Texas City, Dickinson, La Marque, Hitchcock, Bayou Vista, San Leon and Bacliff will all have flooding, according to the weather service.
The flash flood warning expires at 10:45 a.m.
Overnight rains flooded roads in some parts of Galveston County, causing some schools to cancel or delay classes Tuesday morning.
Texas City Independent School District canceled all classes Tuesday, the district announced on Twitter.
The College of the Mainland campus is Texas City is closed, the college said.
Clear Creek Independent School District reported delays, but said the district is operating on a normal schedule.
Some flooding was reported on Hughes Road in Dickinson early Tuesday morning, but that road is now passable, according to the Dickinson Police Department.
The rain caused some home deliveries of The Daily News to be delayed, the newspaper said.
Most of southern and eastern Galveston County was under a flash flood warning until 7 a.m., according to the National Weather Service in League City.
Some areas of the county received between 6 and 7 inches of rain on Tuesday morning.
This is a developing story. Check back later for more details.