From typicallyspanish.com

National
29 Spanish provinces on alert as the high temperatures continue
By h.b.
Aug 4, 2008 - 6:38 PM

A total of 29 provinces across Spain have been put on Heat Alert today for high temperatures, expected to reach 40 degrees in some places. The current heatwave affecting the country comes from a mass of African air, and five provinces are on Orange Alert, where considerable care of children and the elderly is advised. They are Toledo, Ciudad Real, Jaén, Córdoba and Sevilla.

Yellow alerts are in the other 24 provinces on alert - Orense, León, Zamora, Valladolid, Salamanca, Avila, Segovia, Madrid, Cáceres, Badajoz, Huelva, Cádiz, Guadalajara, Cuenca, Albacete, Granada, Murcia, Valencia, Alicante, Teruel, Zaragoza, Huesca, Lleida and Tarragona.

The heat is expected to last in most areas until Thursday.
The Ministry for Health is advising people to drink plenty of water of liquids, eat light meals, ensure that they use effective sun protection, and to lower the blinds at home during the central hours of the day.