As Hurricane Harvey continues to wreak havoc and leave Greater Houston under many feet of water, two Bay Area tech giants are pledging matching funds to encourage private citizens to donate to the disaster relief effort.

As the Associated Press reports, as of this morning, Facebook pledged up to $1 million in matching donations made through their platform to the Center for Disaster Philanthropy (CDP), which has a Donate button at the top of its Facebook page.

"Please know that donations will be distributed to vetted nonprofit organizations with the capacity and capabilities to help Harvey-affected communities recover," writes the CDP. "The CDP Hurricane Harvey Recovery Fund is focused on medium and long-term rebuilding needs. We know from past disasters, especially through our experiences with hurricanes and floods, full recovery will likely take many years. The CDP Hurricane Harvey Recovery Fund will support recovery needs long after the TV cameras and news teams rollup coverage and turn the eye of the world away from this disaster."

Meanwhile, Google has set up its own disaster relief page, pledging to match the first $1 million in donations made there to the organization Network For Good, which will send funds along to the American Red Cross for the immediate relief effort. Says the company, "Google will cover all processing fees so that 100% of your donation goes to where it is needed most."

Google also announced Tuesday that it had matched employee donations and already sent $750,000 through its non-profit arm, Google.org, to organizations including the American Red Cross, Habitat for Humanity, and Save the Children.

After six days of pummeling the region, Harvey has now set a record for the most recorded rainfall from a single tropical cyclone in the continental US, according to the New York Times, topping 48 inches so far.