A yellow weather alert has been issued for twelve districts across mainland Portugal, according to the Portuguese Institute for Sea and Atmosphere (IPMA). The alert is in effect due to forecasts of showers and thunderstorms. This signifies a potential risk of dangerous weather conditions, though not immediately severe. The affected districts span a significant portion of the country, prompting residents to exercise caution. Authorities advise staying informed about weather updates and taking necessary precautions. The IPMA will continue to monitor the situation and provide further advisories as needed.