Devastating earthquakes typically cause enormous damage and loss of life. The rapid assessment of the final death toll after an earthquake and the revision of the estimates based on the timely release of fatalities are crucial to emergency decision-making. This study using the February 6, 2023, MS 8.0 and MS 7.9 Kahramanmaraş, Türkiye earthquakes as an example to estimate the ultimate number of fatalities. An early Quick Rough Estimate (QRE) based on the number of deaths reported by the Disaster and Emergency Management Presidency of Türkiye (AFAD) is conducted, and it dynamically adjusts these estimates as new data becomes available. The range of estimates of the final number of deaths can be calculated as 31,384–56,475 based on the "the QRE of the second day multiplied by 2 to 3" rule, which incorporates the reported final deaths 50,500. The Quasi-Linear and Adaptive Estimation (QLAE) not only adaptively adjusts the final post-earthquake fatality estimate within two days, but also estimates the next reported deaths. The correct order of magnitude of the final death toll can be estimated as early as 13 hours after the MS 8.0 earthquake. In addition, additional earthquakes such as May 12, 2008, MS 8.1 Wenchuan, China earthquake, September 8, 2023, MS 7.2 Al Haouz, Morocco earthquake, November 3, 2023, MS 5.8 Mid-Western Nepal earthquake, December 18, 2023, MS 6.1 Jishishan, China earthquake, January 1, 2024, MS 7.2 Noto Peninsula, Japan earthquake and August 8, 2023, Maui, Hawaii, fires are added again to verified the correctness of the model. It is found that the fatalities from this fire are approximately equivalent to those of an MS 7.4 earthquake. These methods can be considered as a complement to Quake Loss Assessment for Response and Mitigation (QLARM) or Prompt Assessment of Global Earthquakes for Response (PAGER).