Roberto Brasero warns Spain about the summer heat wave: what it is and how it will affect you in the coming weeks.

Meteorologist Roberto Brasero has warned of an unusual heat wave that anticipates the arrival of the summer dog days , the hottest period of the year in Spain. Although this period typically begins in mid-July, extreme temperatures have arrived earlier in 2025. The Spanish Meteorological Agency (AEMET) has issued warnings for highs that could reach 40°C in several areas of the country. Brasero warns that this "early summer" confirms the trend toward hotter summers . The heat retained in the seas and land after the June solstice intensifies this situation.

The dog days are not a one-time phenomenon, but rather a regular period of intense heat. It normally lasts from July 15th to August 15th , although this year , typical conditions are already present . Regions in the south and northeast are already recording temperatures close to or above 40°C . In provinces such as Córdoba, Zaragoza, and Badajoz , heat advisories are already in effect. Furthermore, tropical nights are forecast, with lows above 20°C , making rest difficult.

Which areas are under warning and what temperatures are expected

The most affected provinces include Seville, Jaén, Huesca, Tarragona, and Cáceres , among others. In the Guadalquivir Valley, temperatures could reach 42°C or more. In the northern plateau , temperatures of up to 36°C or 38°C are expected in specific locations. According to the AEMET (Spanish Meteorological Agency ), the peak of the thermal episode will arrive between Thursday and Friday . This phenomenon poses a significant health risk , especially for vulnerable groups. It is recommended to avoid sun exposure during the hottest hours of the day.

Despite the high temperatures, the AEMET (Mexico City Meteorological Agency) has not yet classified this episode as a heat wave . To do so, it must last for more than three consecutive days in much of the country. If temperatures drop in the north on Friday or Saturday , the criteria would not be met. Even so, the impact of the heat is significant . Brasero emphasizes the need to stay properly hydrated and follow official guidelines to prevent heat exhaustion and complications.