July 19-20 bring a variety of safety challenges for Mainers and visitors. Extreme heat, severe summer storms and possible flash flooding.

Extreme heat

The National Weather Service is advising that "the Heat is On" today across all of Maine, especially in southwestern Maine, where the NWS has issued a Heat Advisory.

A Heat Advisory means that a period of hot temperatures is expected. The combination of those temperatures and high humidity creates a situation in which heat illnesses are possible.

MEMA joins the National Weather Service in advising:

* Drink plenty of fluids

* Stay in an air conditioned location if possible

* Stay out of the sun

* Check in on relatives, neighbors and friends

* Never leave children or pets alone in closed vehicles.

* Take extra precautions if you work or spend time outside.

* If possible, reschedule strenuous activities to early morning or evening

* Wear light-weight and loose-fitting clothing

* If you must be outdoors, take frequent breaks in shaded or air conditioned locations

* Drink plenty of water

* Know the signs and symptoms of heat exhaustion and heat stroke and call for help immediately if needed.

Severe storms

Some severe storms are also possible on Friday. On Saturday, thunderstorms are likely and severe ones possible, as a strong cold front moves through Maine. In addition to the risk posed by lightning, flash flooding is also a possibility.

In response to potential severe storms, remember:

* No place outside is safe during a thunderstorm.

* Lightning kills more people annually than tornadoes or hurricanes.

* If you hear thunder, you're likely within striking distance of the storm.

Flash flooding

Flash flooding can occur during summer storms that drop heavy rainfall on a concentrated area in a sort time span. Flash flood facts to keep in mind:

* As little as two feet of water will float most cars and small trucks.

* Nearly half of all flash flood deaths are vehicle related.

* Swiftly moving water is extremely powerful and can easily overpower a person.

* Check frequently on weather warnings from broadcasters or on the web.