^ Davis, Aaron; Gillum, Jack; Tran, Andrew. "How Houston's 'Wild West' growth may have contributed to devastating flooding". Washington Post. Retrieved September 10, 2018. In May 2015, seven people died after 12 inches of rain fell in 10 hours during what is known as the Memorial Day Flood. Eight people died in April 2016 during a storm that dropped 17 inches of rain.
Houston was incorporated in 1837 and adopted a ward system of representation shortly afterward in 1840.[94] The six original wards of Houston are the progenitors of the 11 modern-day geographically-oriented Houston City Council districts, though the city abandoned the ward system in 1905 in favor of a commission government, and, later, the existing mayor–council government.

Among the several references to the Sabbath in Acts ( 1:12 ; 13:14-44 ; 15:21 ; 17:2 ; 18:4 ; 20:7 ) there is little evidence to suggest that the earliest Christian communities deviated from the traditional Sabbath observed on the seventh day. The lone reference to a gathering "On the first day of the week" ( 20:7 ) most likely reflects an emerging Christian consensus that the first day was an appropriate day on which to meet for worship and celebrating the Lord's Supper.

Houston is home to the largest Muslim population in Texas and the Southern United States as of 2012.[138] It is estimated that Muslims make up 1.2% of Houston's population.[138] As of 2016 Muslims in the Houston area included South Asians, Middle Easterners, Africans, Turks, and Indonesians. In 2000 there were over 41 mosques and storefront religious centers, with the largest being the Al-Noor Mosque (Mosque of Light) of the Islamic Society of Greater Houston.[139]
Following World War I, a group known as the Seventh Day Adventist Reform Movement was formed as a result of the actions of L. R. Conradi and certain European church leaders during the war, who decided that it was acceptable for Adventists to take part in war. Those who were opposed to this stand and refused to participate in the war were declared "disfellowshipped" by their local Church leaders at the time. When the Church leaders from the General Conference came and admonished the local European leaders after the war to try to heal the damage, and bring the members together, it met with resistance from those who had suffered under those leaders. Their attempts at reconciliation failed after the war and the group became organized as a separate church at a conference that was held on July 14–20, 1925. The movement officially incorporated in 1949.[132]
In Eastern Christianity, the Sabbath is considered still to be on Saturday, the seventh day, in remembrance of the Hebrew Sabbath. In Catholicism and most sects of Protestantism, the "Lord's Day" (Greek Κυριακή) is considered to be on Sunday, the first day (and "eighth day"). Communal worship, including the Holy Mysteries, may take place on any day, but a weekly observance of the resurrection is made consistently on Sunday. Western Christianity sometimes refers to the Lord's Day as a "Christian Sabbath", distinct from the Hebrew Sabbath, but related in varying manner.

The few hundreds of Seventh Day Adventists grew to about 3,000 by 1863, which is considered the official establishment of the church. In the late 1840s, the Adventist church was mostly made up of scattered groups where many disagreed on certain issues. Later, co-founder James White helped push forward a constitution for the many churches to unify under and named the denomination Seventh Day Adventist.

^ "Adventism" in Encyclopedia of Evangelicalism by Randall Balmer, p7 describes Seventh-day Adventists as "an evangelical denomination." The Christian Research Institute claims "mainstream Adventism is primarily evangelical" in the sense that "the great majority of Adventist scholars, teachers and pastors that [the author has] spoken with believe firmly in salvation by grace through faith alone." "Seventh-day Adventism: Christian or Cultic?" from the Christian Research Institute. Accessed 25 Feb 2008.[dead link]

The early prophets and historians occasionally make mention of the Sabbath. It is sometimes named in connection with the festival of the new moon (2 Kings 4:23; Amos 8:5; Hosea 2:11; Isaiah 1:13; Ezekiel 46:3). The prophets found fault with the worship on the Sabbath, because it was not spiritual nor prompted by love and gratitude. The Sabbath is exalted by the great prophets who faced the crisis of the Babylonian exile as one of the most valuable institutions in Israel's life. Great promises are attached to faithful observance of the holy day, and confession is made of Israel's unfaithfulness in profaning the Sabbath (Jeremiah 17:21-27; Isaiah 56:2,4; 58:13; Ezekiel 20:12-24). In the Persian period Nehemiah struggled earnestly to make the people of Jerusalem observe the law of the Sabbath (Nehemiah 10:31; 13:15-22).
In addition to the ministries and institutions which are formally administered by the denomination, numerous para-church organizations and independent ministries exist. These include various health centers and hospitals, publishing and media ministries, and aid organizations. Present Truth Magazine is an independent online magazine for those claiming to be "evangelical" Adventists.
The Unification Church has a regular day of worship on Sunday, but every eight days Unificationists celebrate the day of Ahn Shi Il, considered as Sabbath but cycling among the weekdays of the Gregorian calendar. The Family Pledge, formerly recited at 5:00 a.m. on Sundays, was moved to Ahn Shi Il in 1994 and includes eight verses containing the phrase "by centering on true love".
^{The Houston area encompasses more than 300 private schools,[238][239][240] many of which are accredited by Texas Private School Accreditation Commission recognized agencies. The Houston Area independent schools offer education from a variety of different religious as well as secular viewpoints.[241] The Houston area Catholic schools are operated by the Archdiocese of Galveston-Houston.
Houston's murder rate ranked 46th of U.S. cities with a population over 250,000 in 2005 (per capita rate of 16.3 murders per 100,000 population).[228] In 2010, the city's murder rate (per capita rate of 11.8 murders per 100,000 population) was ranked sixth among U.S. cities with a population of over 750,000 (behind New York City, Chicago, Detroit, Dallas, and Philadelphia)[229] according to the Federal Bureau of Investigation (FBI). Sabbath-keeper}