LiFePO4's are reasonably happy at 30ºC. They will loose capacity a bit quicker above 35ºC but, unlike lead acid temperature is not so much of a big deal for them.
Fears of the fire/bomb risk:
Lithium ion batteries will go into thermal runaway at, if I remember rightly, 356ºC whereas LiFePO4's are good for 460ºC until runaway starts. These are internal temperatures.
A good BMS will ensure this can never be due to over charging or discharging too fast.
Keeping them away from a heat source is also a good idea.