The mercury reached 45.1 degrees Celsius (113.2 Fahrenheit) just before 3 p.m. local time in Villevieille, in the Gard department in southern France, according to the French national weather service Météo-France.This is 1 degree higher than the previous record from 2003. It's so hot in Spain that manure self-ignited, sparking a 10,000-acre wildfireAround 4,000 French schools were closed on Friday and the opening hours of parks and public swimming pools were extended. French authorities have taken a number of radical steps this week to prevent a repeat of the tragic consequences of the 2003 heat wave that left around 14,000 people dead.Read MoreParis activated its heat emergency plan last weekend, put together in the aftermath of the 2003 heat wave. Cooling rooms were opened in some municipal buildings and mist showers were installed in the streets. Climate scientists have warned that heat waves such as this one are becoming more frequent and increasingly severe because of the climate crisis. Météo-France said the frequency of such events is expected to double by 2050.Tourists walk under umbrellas to protect themselves from the sun on a warm summer day in Barcelona on June 28.Heat emergencyEurope has been battling the heat all week, with Germany, Poland and the Czech Republic each recording their highest-ever June temperatures on Wednesday.The German Weather Service said temperature of 38.6 degrees Celsius (101.5 Fahrenheit) was recorded at 2:50 p.m. local time on Wednesday in Coschen, on the country’s border with Poland.The previous record stood at 38.5 Celsius (101.3 Fahrenheit), which was measured in 1947 in Bühlertal, which lies close to France.How your health is at risk during a heatwaveIn Spain, firefighters have been battling a 15,000-acre wildfire near Tarragona in the country’s northeast since late on Wednesday. According to the Catalan Fire Brigade, the fire likely started after an improperly stored pile of manure spontaneously combusted, causing sparks. The firefighters said the blaze was one of the worst in Catalonia in the last 20 years. While temperatures around 100 degrees Fahrenheit may not seem too high, they are way above seasonal averages for the region, and episodes of intensely hot weather are more common during July and August. The heat wave is also unusual because of its timing. Such episodes of intensely hot weather are more common during July and August.On top of that, many European cities are not designed to deal with such temperatures. Air conditioning is less common and public transportation systems often struggle.