Spring rainfall and the early arrival of warm temperatures are creating an "ideal scenario" for the proliferation of mosquitoes, particularly the tiger mosquito (Aedes albopictus), and cockroaches in Catalonia. Accumulated water in containers and natural areas, combined with temperatures that already exceeded 25 degrees Celsius in April, are fostering their reproduction, according to Adepap.

Adepap spokesperson Andreu Garcia notes a trend towards the de-seasonalization of pests. Mild winter temperatures allow reproductive cycles to continue or be minimally reduced. This necessitates advancing control campaigns, which have already begun in April for species like the American cockroach (Periplaneta americana), common in sewers, and the German cockroach (smaller), found in homes and restaurants.

Regarding rats, although they are a year-round pest, they are more visible in the summer. Adepap highlights their role as reservoirs for serious zoonotic diseases. Following the hantavirus outbreak declared in May, increased caution is advised, although Garcia emphasizes that human-to-human transmission is "very rare" and the risk in Catalonia is minimal.