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Houston preacher Joel Osteen's megachurch is now welcoming Texans displaced by Hurricane Harvey following an onslaught of social media criticism for initially staying shut.

On Tuesday, Osteen tweeted that his church is providing shelter for hurricane victims.

"Victoria and I care deeply about our fellow Houstonians. Lakewood’s doors are open and we are receiving anyone who needs shelter," he wrote.

By the afternoon, hundreds of volunteers had arrived to collect bags packed with donations from locals. Cars lined the building's perimeter as people waited to hand in their donations.

Paul Osteen, Joel Osteen's brother, said in a Facebook live on the church's page that doctors and nurses had arrived to volunteer at Lakewood. He said the church had set up a medical center for those in need.

Pastor Joel Osteen had said in a statement late Monday that he never shut his doors to those in need and shared pictures that appeared to show the church, which seats thousands, had experienced flooding in order to back up claims the church was "inaccessible."

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“We have never closed our doors. We will continue to be a distribution center for those in need,” Osteen said. “We are prepared to shelter people once the cities and county shelters reach capacity. Lakewood will be a value to the community in the aftermath of this storm in helping our fellow citizens rebuild their lives.”

Volunteers flock to Lakewood church in Houston with donations, which are loaded onto trucks headed to GRB convention center. pic.twitter.com/1P1iz0tSyX — Jacob Rascon (@Jacobnbc) August 29, 2017

On Saturday, Osteen wrote on Twitter that he was praying for the safety of those affected by the flooding.

“Victoria & I are praying for everyone affected by Hurricane Harvey. Please join us as we pray for the safety of our Texas friends & family,” Osteen wrote.

Hurricane Harvey dumped as much as 20 inches of rain on parts of Houston, leading to "catastrophic and life-threatening flooding," according to the National Weather Service.

"This may end up being one of the worst flood disasters in U.S. history," the Weather Channel warned.

Approximately 3,000 rescues have been carried out in Texas since the storm hit and nearly 300,000 people were without power in southeastern parts of the state.

On Sunday, Lakewood Church posted on Facebook saying the facility was "inaccessible" due to "severe flooding."

But after several people posted videos on Twitter appearing to show the location relatively unscathed and unaffected by flooding, a swarm of Twitter users began questioning why Osteen’s megachurch, which has the capacity for more than 16,000 people and was once home to the NBA's Houston Rockets, hadn’t been opened as a shelter to those in need.

Houston's Joel Osteen has a net worth over $50m and a church that holds 16,800 but this is all he's offering. pic.twitter.com/rmhdWK6ZAO — Mark Elliott (@markmobility) August 28, 2017

deeply disappointed @joelosteen. that House belongs to God + was built for people in need. you should have been the first to open your doors — TRAVIS GARLAND (@TravisGarland) August 29, 2017

“Houston's Joel Osteen has a net worth over $50m and a church that holds 16,800 but this is all he's offering,” Mark Elliott of the Economic Mobility Corporation tweeted in reference to Osteen’s tweet.

Singer Travis Garland tweeted that he was “deeply disappointed” by Osteen’s actions.

“deeply disappointed @joelosteen. that House belongs to God + was built for people in need. you should have been the first to open your doors,” Garland wrote.

Joel Osteen should keep his church closed... forever. #JoelOsteen @JoelOsteen — Brandi Gallard (@BrandiGallard) August 29, 2017

"Give to the one who asks you..

Unless they ask you for shelter in your fancy church. Then screw 'em"

-Bible verse, according to #JoelOsteen — Erik Bransteen (@erikbransteen) August 29, 2017

However, Osteen shared images that appeared to show standing water inside the building’s parking garage and surrounding areas.

Osteen also reached out to his congregation, offering prayers and explaining how they could volunteer for a relief effort the church was organizing.

“Over the last couple of days, as the enormity of this storm was being realized, we have been working to organize relief efforts for the Houston area with our friend Franklin Graham and the disaster relief organization that he oversees, Samaritan’s Purse,” the release said.