With the increasing frequency and intensity of extreme weather disasters, it is essential for Office of Head Start staff and Early Head Start/Head Start (EHS/HS) program leaders to prepare for and respond effectively to these challenges. This brief presents data on the number and percentage of EHS/HS sites located in extreme weather affected areas from 2012 to 2017, along with estimates of the impacts of these disasters on EHS/HS enrollment and service delivery. This brief is based on a comprehensive approach to document how extreme weather disasters disrupt the delivery of EHS/HS services to children and their families. The SRI study team integrated multiple years of data from the Head Start Program Information Report (PIR) and Head Start Service Location datasets with contemporary records from Federal Emergency Management Agency (FEMA) disaster declarations and community demographic information from the U.S. Census Bureau's American Community Survey (ACS). The authors linked the FEMA and PIR data using Federal Information Processing Standards (FIPS) county codes for areas affected by extreme weather disasters that received federal disaster relief funding. They then used regression analyses to estimate the impacts of these weather disasters on the implementation of Head Start services.