Don't freak out.. There have been reports of large hives found in Allen and Arlington some have been aggressive. One woman got stung over 100 times. The concern is if they are the africanized bees, the honeybee's aggressive cousin. According to an article from WFFA a bee keeper said “When they bump into you, that’s just a warning,” “But when they start with their stingers out that’s when you know they’re kinda more aggressive, they’re hybrids, they’re Africanized.
Africanized bees first appeared in Texas in the 1990s and are now present throughout the metroplex and beyond. The only way to know if they are Africanized is to do official testing. If you see a bee hive call the city and let them handle it.
Loud noises like lawn mowers get the bees agitated . Keep calm and find a safe place and don't swat at the bees. Bees also multiply fast in hot weather.