Of the more than 46,000 people helped to date through using CrowdSource Rescue, 370 were in southeastern Texas this past week after Imelda -- a tropical storm that weakened to a tropical depression -- thrashed the area, according to founder Matthew Marchetti, 29.
The free website works by connecting professional first-responders and vetted volunteers with people in need before, during and after a disaster using GPS tracking and mapping technology, according to CrowdSource Rescue's website.
"It was built by Houstonians to help Houston," Marchetti told CNN.
To date, CrowdSource Rescue has been used during 14 incidents around the US and registered more than 18,000 rescuers and volunteers, according to its website.
CrowdSource Rescue is mostly funded through donations.