The next day, it affected the municipality of Tlahuelilpan, and then caused the water levels of the Zimapán Dam and the Moctezuma River to rise.

[6] The Tula River receives water from the drainage systems of Mexico City and its metropolitan area,[7] particularly through the Central Emitter and Emisor Oriente Tunnel.

[8] In August 2021, Hurricane Grace entered Mexican territory for the second time and affected several entities in the center and east of the country.

[13] The growth of the waters in the Tula River began at the beginning of September, reporting overflows and damage in the municipalities of Tezontepec de Aldama, Chilcuautla and Alfajayucan.

[14] On September 6, the Tlautla River and the Palo Grande stream overflowed in the municipality of Tepeji del Río de Ocampo, affecting the communities of Santa Ana Atzcapotzaltongo and Los Álamos, and three neighborhoods were evacuated.

[37] The municipalities of La Misión and Chapulhuacán in Hidalgo, and Tamazunchale in San Luis Potosí, issued alerts due to the rising waters of the Moctezuma River.

[45] On the night of September 17, inhabitants of nine neighborhoods of Tula and two from Tepeji del Río were evacuated again due to the growth in river levels.

[46][47] The Palo Grande stream overflowed, near the place known as La Chorcha, and the old Mexico-Querétaro highway, in the town of Tlaxinacalpan, suffered considerable flooding.

[59][60] On September 20, the Taxhimay, Requena, Endhó, Rojo Gómez, Vicente Aguirre and La Esperanza dams were reported to have released or spilled, as they had exceeded their storage capacity.

[61][62] On September 20, the release volume of the Zimapán dam was expanded[63] and an alert was issued to the municipalities of Querétaro, Hidalgo, San Luis Potosí and Veracruz.

[77] In Atotonilco de Tula, the rains caused some waterlogging and minor damage, while the flood of the Tula River damaged a pedestrian suspension bridge and a vehicular bridge in the town of San José Acoculco, affecting, in turn, the inhabitants of El Recinto and Pueblo Nuevo,[78] In the same way, the drinking water network that supplied the three communities was affected, leaving about 1,500 inhabitants without service.

[84] On September 3, the Felipe Ángeles dam, fed by the Tula River, reported maximum levels in its discharge flow, so an alert was issued for the riverside communities of the municipality of Ixmiquilpan.

[85] In the afternoon-evening of that day, the first overflows were recorded at the height of a local sports unit and in the tourist development of the EcoAlberto Park, without significant damage.

[94][95] The authorities set up a temporary shelter in the offices of the Tasquillo DIF and canceled sporting events due to the risk of contagion from the COVID-19 pandemic.

[98] On September 7, the Tepeji River and the Requena Dam reached their maximum levels and the water caused flooding in four neighborhoods of the municipality.

[101] On September 17, due to the heavy rains recorded, the Chorcha and Atengo neighborhoods were evacuated; the Melchor Ocampo primary school was enabled as a temporary shelter.

[47] In Tezontepec de Aldama, the affectations began on September 2, when the Saldo River overflowed at the height of the La Cruz bridge in San Isidro Presas, where it damaged an overpass.

On September 6, the overflow of the San Luis dam devastated corn fields of Atitalaquia and Tlaxcoapan, where a family was rescued by local police.

[107] On September 8, the flood of the Saldo River reached the bridge that connects the towns of Tlaxcoapan and Doxey, so it was temporarily closed.

[110] As a result of the rains, the authorities set up shelters in the Javier Rojo Gómez Primary School of the municipal capital and in the Doxey Auditorium.

[125] On September 19 due to a new increase in the level of the river, a third evacuation of the neighborhoods was carried out on January 16, Dengui, El Carmen, La Mora, La Malinche, San Lorenzo, San Marcos, PEMEX Housing Unit, downtown area, Fraccionamiento Rancho de Chapultepec; and temporary shelters were enabled in: the Gymnasium of the Sports Unit and "Third time".

On September 11, as a result of the release of the Zimapán Dam, the Río Moctezuma blocked land access to the communities of Las Vegas[128] and the Attached.

Also about 100 people, including elements of the Mexican Army, and the civilian population carried out an aid column, walking approximately 9 km to deliver food in the community of Las Vegas.

[137] On September 9, in the municipality of Tamazunchale in San Luis Potosí, the inhabitants of the neighborhoods San Rafael, Los Naranjos, Estrella, El Carmen and 16 de Septiembre, in the central area, Guadalupe, Ojoxio, Tezilo, in the Taman delegation, and the communities of Xomoco, Tazilal, Vega Larga [138] On the morning of September 7, President Andrés Manuel López Obrador announced at a morning conference the activation of the Plan DN-III in the region and Civil Protection units and the Secretariat of National Defense were deployed in order to evacuate the disaster zone.

[143] On September 9, the Association of Municipalities of the State of Hidalgo (AMEH), delivered in support of a first trailer with 50 tons of food and four vactor units for the desilting of streets and drains.

[150][151] The Ministry of Health of Hidalgo placed four mobile medical units; two operate in the La Malinche neighborhood and on Felipe Ángeles Avenue in Tula de Allende, and the remaining two installed in El Fithzi and San Nicolás in Ixmiquilpan.

As well as the Encalado,[157][158] 81 forest fire brigades, workers from the regional offices of the Semarnath in Tula, ecoguard ecological patrols were reported in the area, for the supervision and guidance of trucks with waste.