From typicallyspanish.com

History
Spain On This Day - July 4
By m.p.
Jul 4, 2008 - 7:04 AM

1994: Spain suffers a heatwave – Murcia reaches 47.2 the highest of the provincial capitals, Alicante also makes the record 41.4 ºC

1997: The council of Bimenes is the first in Spain to declare the Asturian language official in its area