As Harvey’s rains devastated neighborhoods across Houston, local rescue groups provided assistance to people who were stranded or in trouble. More than three thousand requests made from Sunday to Wednesday are shown here.

12 a.m. Monday BEAUMONT PORT ARTHUR HOUSTON Gulf of Mexico Galveston Bay Rescue request 10 miles 12 a.m. Monday BEAUMONT PORT ARTHUR HOUSTON Gulf of Mexico Galveston Bay Rescue request 20 miles 12 a.m. Monday BEAUMONT PORT ARTHUR HOUSTON Gulf of Mexico Rescue request 20 miles 12 a.m. Monday BEAUMONT PORT ARTHUR HOUSTON Rescue request 20 miles 12 a.m. Monday Beaumont Port Arthur Houston Rescue request 25 miles

Thousands of people sought help through these local groups, submitting requests through one of several databases circulating on the internet. The unofficial rescue groups dispatched boats to people who asked for assistance, said Melissa Wynn Adair, co-founder of the Texas Navy, one of the organizations.

Though not every account could be confirmed, in aggregate, the animated map offers a glimpse into the geography of the disaster. Emergency responders could not always keep pace with the influx of rescue requests as residents from neighborhoods across the city watched the waters rise higher and higher.

Sunday

On Sunday night, the rescue calls came mainly from areas along Brays Bayou, which runs through neighborhoods near Rice University and the Texas Medical Center. Calls also began to come in from a small subdivision at the edge of East Houston called Verde Forest, along Greens Bayou.

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7:13 p.m. My grandparents are trapped in their house.

8:56 p.m. Elderly Bedridden...cant walk. Is 100% bed bound

9:53 p.m. Needs evacuation, one elderly person in a wheel chair

Overnight, the calls from northeast Houston increased, and new calls were being heard along Cypress Creek in the north.

Monday

On Monday, rescue requests began to come from the west end of Barker Reservoir, indicating that the dry lake bed used to absorb floodwaters from the upper Buffalo Bayou was filling. And floodwaters in the northeast were spreading rapidly.

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4:17 a.m. These people are outside and flooded out of the home and cannot access the roof. Both are elderly.

5:36 a.m. He’s on bottled oxygen now, and running out. Nausea from lack of oxygen has already started.

7:32 a.m. Need help getting out of here! Don’t think it will get any better! I have a 6 week old and a 1 year old! Running out of food and water!! On the second floor but water is rising.

By the afternoon, things were worse everywhere. There were new calls for help from below the spillways of the Addicks and Barker reservoirs, and dozens more on Cypress Creek. At this point, the calls from the northeast were coming from far outside areas that have been officially designated as flood-prone.

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2:25 p.m. Blind man with medical needs disabled woman and three year old.

8:19 p.m. ELDERLY, NEED WATER, IN ADDICKS RELEASE

9:19 p.m. The water is rising fast and they are on a rescue list for 911 but need out immediately.

Tuesday

It was apparent that the area northeast of the city was one of the hardest hit. Middle-class subdivisions like the Village of Kings Lakes, Beaumont Place, Parkway and Stonefield Terrace had more rescue calls than other areas.

HIDDEN MEADOW Greens Bayou STONEFIELD TERRACE Parkway tidwell Rd. EAST HOUSTON Halls Bayou beaumont hwy beaumont place 1/2 MILE HIDDEN MEADOW Greens Bayou STONEFIELD TERRACE Parkway tidwell Rd. EAST HOUSTON Halls Bayou beaumont hwy beaumont place 1/2 MILE Greens Bayou EAST HOUSTON STONEFIELD TERRACE Parkway Halls Bayou beaumont place 1 MILE Greens Bayou STONEFIELD TERRACE Parkway beaumont place 1 MILE

3:04 p.m. Grandmother has a bad hip and bad knees. grandmother also has a pacemaker.

5:20 p.m. We are on our second story first floor flooded We are both 70 years old

10:56 p.m. 3 adults and 3 children trapped; some might be drowning. Water is knee deep!

Wednesday

By Wednesday morning, as the rains eased in Houston and the rivers began to recede, the storm lingered offshore, picking up more moisture to dump on the old oil towns of Beaumont and Port Arthur to the east. After midnight, as it turned toward shore again, the rescue calls started there.

1:41 a.m. One Pregnant Mother and 4 year old with Asthma and his machine is damaged in the water.

1:56 a.m. It’s my sister and her family I’m not sure of the severity but she’s panicking water is raising in her home and she has an infant please help