Key Points

• In Week 24 (June 12–18, 2023), emergency room visits remained stable across all age groups, and hospitalizations following emergency room visits declined slightly among children (-5%, or 749 fewer hospitalizations).

• Asthma-related visits, which had risen sharply in Week 23 due to weather conditions (high temperatures and thunderstorms) and the presence of allergens (pollen, grasses), declined in Week 24 (-24% among children and -48% among adults) and returned to levels comparable to or close to those of previous years.

• Over the past week, at levels consistent with those of previous years, there was an increase in visits for hyperthermia and heatstroke among children and adults (up 139% and 21%, respectively, or 60 and 30 visits). This increase was accompanied by a more moderate rise in visits for general malaise (+9%, or +77 visits) and isolated fever (+12%, or +199 visits among 2- to 14-year-olds) among children, and vomiting among 15- to 74-year-olds (+9%, or +81 visits).

• Among other indicators, there was an increase in visits for insect bites (+12%, or +125 visits across all ages), skin and subcutaneous infections (+7%, or +396 visits across all ages), and skin rashes in children under 2 years of age (+18%, or +52 visits). For the third consecutive week, there was also an increase in viral meningitis among children (+72%, or +23 visits), at a level higher than those observed since the onset of COVID-19 but comparable to pre-COVID years. The proportion of hospitalizations following visits remained stable.