“…Among the walking pilgrimage routes, the Najaf‐Karbala route is the most popular (72 km) (Al‐Ansari et al., 2020; Lami, Hameed, et al., 2019), and the farthest route is the one that starts from Basra, around 500 km southeast of Karbala (Christia et al., 2016). This religious activity, as is the case for other mass gatherings (e.g., Hajj), can raise multiple health concerns related to communicable and non‐communicable diseases (Al‐Ansari et al., 2020; Albujeer & Almahafdha, 2018; Alqahtani et al., 2021; Hamdanieh & Ostadtaghizadeh, 2021; Lami et al., 2021; Memish, 2010; Memish et al., 2019; Obaid et al., 2020). For example, many pilgrims can be susceptible to temperature extremes due to prolonged exposure to outdoor climates (Kang et al., 2019; Memish, 2010; Noweir et al., 2008; Saeed et al., 2021; Yezli et al., 2019).…”