If it is too warm 90F and over my thamnobates often hide bellow stones on bottom (i have them so my screen cages will not fly by ocassion out)- especially gravid females. Simple make them wet shelter and they will be fine. However in my region is never over 98F, last years were such temperatures but no losses. I am putting dripping bottle over screen during warmest hours, if it is really bad than frozen.
