Aside from that, France says a wildfire uncovered a cache of suspected WWII-era ammunition, which did not detonate. No specific reports of any weapons exploding in Germany or Holland either. Slovakia removed and buried two naval mines for a controlled explosion (not wildfire related) and Germany and Hungary each found a bomb as well (not wildfire related).
The subheadline "High heat has caused several weapons to explode in France, Belgium, Germany and the Netherlands" is not fully supported by the article or the facts.