Record-breaking Texas heat wave poses danger and raises questions about heat bursts.

Unusual, drastic temperature spikes called heat bursts have been witnessed in Central Texas due to hot temperatures and decaying evening thunderstorms. Heat bursts occur at the tail end of thunderstorms, but those are happening less often in Bexar County and South Texas lately. The chances of a heat burst in San Antonio largely depend on the formation of thunderstorms in the area, which is becoming a less likely event with each passing day. Meanwhile, South Texas continues to be roasted by triple-digit temperatures made even more oppressive by elevated humidity levels.