Texas Local Government Code - LOC GOV'T § 601.043. Notice of Claim

(a) In an action against an authority for damages, injury to property, or personal injury or death, a person making a claim shall notify the authority of the claim, reasonably describing the damage or injury and stating the time, manner, and place of the incident from which the claim arose. The notice must be given within six months after the date of the incident.

(b) Notice need not be given if an authority has actual notice of the damage or injury.