That mentioned two months are the moment, when in Poland happens the highest temperature is deeply warmth.
There is no summary information but local newapapers informed about 62 casualties, above 150 wounded, ruined apartments, telegraph poles and trees. Lightning bolts caused over 100 houses fires. Second huge gale occurred in July 1931 near Lublin. Regional media break the news about wind blowing at a speed of 500 km/h. Current one of the largest storm happened between Wrocław and Łódź in 23rd of July 2009 – this two cities are more than 200 km away from themselves. Gale (called “Derecho”) causes death of 10 people and 100 wounded. In Poland storms with lightning are annual incident. Highest recurrence of gales is in mountainous part of country – in places called Żywiecczyzna, Bieszczady Mountains and Tatra Mountains it happen almost 35 days per year. Lowest recurrence is in the northern part – one in the 18 days.