This story has been updated.

The pictures are heartbreaking, the statistics are mind-boggling. And, incredibly, it’s still getting worse.

Since Hurricane Harvey made landfall in Texas late Friday night, more than 40 inches of rain have fallen on parts of the Houston metro area, burying much of the city under water. With rainfall topping 50 inches in spots, Harvey now ranks the worst rainstorm in U.S. history.

“Of course I’m surprised,” Houston meteorologist Tim Heller told Grist on Monday. “We tell people to prepare for the worst, but this is worse than the worst! This isn’t isolated flooding, this isn’t neighborhood flooding, this is area flooding, regional flooding. The warnings were there for 15-25 [inches] of rain, then 30, then 40. I quit giving out storm totals because I’m not sure what we’ll end up with now.”