Officials say another person has died in Houston-area floods, raising the toll to eight.

The Austin County Sheriff’s Office didn’t provide more information Wednesday on the most recent drowning.

Six people have died in Harris County and one more in neighboring Waller County since a huge storm dropped more than a foot of rain on the area. Thousands of people have been evacuated from their homes and major highways were closed after the rains that started Sunday overwhelmed Houston’s bayous.

Forecasters have issued another flash flood watch for Houston through Wednesday night.

The Houston Independent School District has resumed classes after being closed for two days because of the flooding.

Elsewhere, authorities blamed heavy rains for a sinkhole that opened up on a residential street in northwest Dallas.

As flooding caused by this week’s heavy rainfall continues to inundate Houston-area homes, officials are keeping an eye on two major dams deemed "extremely high risk" by the U.S. Army Corps of Engineers.

Authorities said Wednesday the dams — at 50 percent capacity — are working well and were classified as high risk only because they’re about two decades beyond their life expectancy and in a populated area.

Richard Long, with the Corps’ project operations branch, says it will take a long time to drain the reservoirs behind the dams in controlled releases. There is about two months’ worth of water to get rid of.

But as more water continues to come into the reservoirs from rivers and streams, officials expect some homes and streets near the dams to be flooded.

(Copyright (c) 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)

Join our Newsletter for the latest news right to your inbox