North Texas doctors are urging caution due to a rise in heat illness cases. This warning is being reported by CW33.com, a local news source in Dallas, TX.

Further information on the situation can be found on the CW33.com website, which has published articles on the topic. The articles are titled "North Texas doctors urge caution as heat illness cases rise" and are available for readers to access.

Details on the heat illness cases and the doctors' warnings are available from CW33.com, providing readers with more information on the situation in North Texas.