Key points

Chikungunya, dengue, Zika

• Since the start of enhanced surveillance in the region, 65 cases of arboviral diseases—54 confirmed cases and 11 probable cases—have been identified in Île-de-France, including 64 cases of dengue and 1 case of chikungunya, all of which were imported (Table 1 and Figure 2).

• The cases were imported from the Caribbean (35), Latin America (11), Asia (10), and sub-Saharan Africa (7) (Figure 3). Among the cases, 61 (95%) were potentially viremic in Île-de-France, and 30 (46.2%) resided in municipalities in the region colonized by the “tiger mosquito” (Aedes albopictus).

Extreme heat, heatwave

• ​​​​​​​The Île-de-France region was at green alert level in week 27: an overall decrease in emergency department visits for heat-related conditions in week 27, with a 32% decrease in hospital emergency department visits (n=94) and a 52% decrease in SOS Médecins calls, though with low call volumes (n=16).

• The Île-de-France region is under a green alert in week 28 as of the publication date of this report.